Philippines President Gloria Arroyo is lifting martial law in a southern province where 57th people were killed in political violence, aides have said.
Martial law was imposed in Maguindanao a week ago to quell what the government said was a rebellion by the Ampatuan clan, blamed by police for the death.
Members of a rival clan and journalists were among those killed on 23 November as they went to file election papers.
A senior official said the martial law edict would be lifted at 1300 GMT.
In the past week, police and military personnel have carried out a major operation against those suspected of involvement in the massacre last month.
Twenty-four people have been charged with rebellion, including several figures from the Ampatuan clan. Maguindanao's governor, Andal Ampatuan Sr, was among them.
His son, clan leader and local mayor Andal Ampatuan Jr, has been charged with multiple counts of murder.
Large quantities of weapons and ammunition were also seized in the operation. Critics opposed the imposition of martial law on 4 December, saying the massing of armed men in Maguindanao did not constitute sufficient grounds for the measure.
A special session in the Philippines Congress has been debating the declaration of martial law over the past four days and the government has faced stiff questioning.
Now it says it has achieved its objectives but the number of suspects it previously said it was seeking and the number arrested do not seem to add up, says the BBC's Rachel Harvey in Bangkok.
The government was criticised initially for reacting too slowly to the massacre and then came under fire for over-reacting when it imposed martial law, our correspondent adds.
It was the first time martial law had been used in the country since the fall of autocrat Ferdinand Marcos in 1986.
Clan leader Esmael Mangudadatu, whose relatives were among those killed, has alleged the massacre was carried out to prevent him running against the younger Ampatuan for governor of Maguindanao next year.
Thirty journalists who were accompanying Mr Mangudadatu's supporters as they went to file his candidacy for 2010 were also murdered.
Tiger Woods is taking an indefinite break from the professional golf to tackle problems in his private life. In statement on his website, he said he was aware of the disappointment "my infidelity" had caused to his family. The world's top golfer said he wanted to "try to repair the damage done" and asked for privacy.
His biggest sponsor, Nike, said it would continue to stand by him but Mr Woods's agent said it was too early to discuss any other business deals. On his website, Mr Woods said he was "profoundly sorry" and asked for forgiveness.
The 33-year-old said: "I would like to ask everyone, including my fans, the good people at my foundation, business partners, the PGA Tour, and my fellow competitors, for their understanding. "What's most important now is that my family has the time, privacy, and safe haven we will need for personal healing.
"After much soul searching, I have decided to take an indefinite break from professional golf. I need to focus my attention on being a better husband, father, and person."
In a separate statement on his website, he also indicated he would be taking some time off from his responsibilities with the Tiger Woods Foundation - a charity he set up with his late father to help young people
He said he knew his staff would continue efforts to maintain the foundation's work during his "absence". He has been married to his wife Elin for five years and they have a two-year-old daughter and 10-month-old son.
In a statement, Nike said: "Tiger has been part of Nike for more than a decade.
"He is the best golfer in the world and one of the greatest athletes of his era. We look forward to his return to golf.
"He and his family have Nike's full support."
Mr Woods's agent Mark Steinberg also voiced his support for the golfer's decision but said it was "premature" to discuss particular business deals. "Suffice it to say, we have had thoughtful conversations and his sponsors have been open to a solution-oriented dialogue," he said. Of course, each sponsor has unique considerations and ultimately the decisions they make we would fully understand and accept.
In a statement the Professional Golfers Association (PGA) Tour said it supported the golfer's decision, the Associated Press news agency reported. Tour commissioner Tim Finchem said the celebrity's "priorities are where they need to be".
"We look forward to Tiger's return to the PGA Tour when he determines the time is right for him," he said.
In London, lawyers for the world number one golfer obtained an injunction preventing certain information purportedly about him being published. It was granted by a judge at the High Court, and concerns alleged information which cannot be disclosed for legal reasons.
Last week Mr Woods apologised to his family for "transgressions".
Speculation about his private life has been intense since he was involved in a car crash outside his Florida home two weeks ago.
Newspaper allegations followed about extra-marital affairs.
Mr Woods has not been seen in public since the accident, in which his car hit a tree and fire hydrant.
The golfer, who was found bleeding and semi-conscious, was later charged with careless driving, which carries a $164 (£98) fine and four points on his driving record.
Mr Woods has become an international sporting icon since winning his first major in 1997 at the age of 21. At 33, he is just four short of equalling Jack Nicklaus's record of 18 major victories and is regarded as one of the world's all-time great golfers.
Iran faces "significant" new sanctions over it is nuclear programme, according to US Defense Secretary Robert Gates.
And he reiterated that all options - including possible military action - should stay on the table.
Mr Gates was speaking to US troops during a visit to northern Iraq.
His comments come a day after the US, Britain and France warned that Iran faced tougher sanctions unless it immediately complied with UN Security Council resolutions.
Mr Gates said: "I think that you are going to see some significant additional sanctions imposed by the international community, assuming the Iranians don't change course."
But despite warning that possible military action should stay on the table, he said it would "only buy some time, maybe two or three years".
Iran is already subject to UN sanctions over its nuclear programme, which the West suspects is for military purposes.
Any move towards a new round of sanctions is expected to involve long and arduous negotiations with reluctant Security Council members, such as China, says the BBC's Barbara Plett at the UN.
There is also the question about whether or not agreement could be won on significantly tougher restrictions, she adds.
Iran has insisted its nuclear programme is for purely peaceful purposes and has warned that further sanctions will be ineffective.
It has not signed up to a six-nation compromise plan over its controversial uranium enrichment programme.
Russia, China, the US, UK, France and Germany have suggested uranium enrichment for civilian nuclear energy could be regulated if Iran handed over its uranium to Russia to manage the process.
Digital rights groups and bloggers have heaped criticism on Facebook's changed of privacy policy. Critics said the changes were unwelcome and "nudged" people towards sharing updates with the wider web and made them findable via search engines.
The changes were introduced on 9 December via a pop-up that asked users to update privacy settings.
Facebook said the changes help members manage updates they wanted to share, not trick them into revealing too much. "Facebook is nudging the settings toward the 'disclose everything' position," said Marc Rotenberg, executive director of the US Electronic Privacy Information Center (Epic). "That's not fair from the privacy perspective."
Epic said it was analysing the changes to see if they amounted to trickery.
In a statement, the Electronic Frontier Foundation said: "These new 'privacy' changes are clearly intended to push Facebook users to publicly share even more information than before. "
It added: "Even worse, the changes will actually reduce the amount of control that users have over some of their personal data."
Facebook began testing the privacy changes during mid-2009 before introducing them site-wide. The changes let people decide who should see updates, whether all 350 million Facebook members should see them, and if they should be viewable across the web.
Barry Schnitt, a Facebook spokesman, said users could avoid revealing some information to non-friends by leaving gender and location fields blank.
He said the changes to privacy made it easier to tune the audience for an update or status change so default settings of openness should have less impact.
"Any suggestion that we're trying to trick them into something would work against any goal that we have," said Mr Schnitt.
Facebook would encourage people to be more open with their updates because, he said, that was in line with "the way the world is moving".
Assessing the changes, privacy campaigners criticised a decision to make Facebook users' gender and location viewable by everyone.
Jason Kincaid, writing on the Tech Crunch news blog, said some of the changes were made to make Facebook more palatable to search sites such as Bing and Google.
Blogger Marshall Kirkpatrick was worried that the default setting for privacy was to make everything visible to everyone.
"This is not what Facebook users signed up for," he wrote. "It's not about privacy at all, it's about increasing traffic and the visibility of activity on the site."
He also criticised the fact that the pop-up message that greets members asking them to change their privacy settings was different depending on how engaged that person was with Facebook.
He said Facebook was "maddeningly unclear" about the effect of the changes.
Many users left comments on the official Facebook blog criticising the changes. Some said they had edited their profiles and reduced their use of the social site to hide information they do not want widely spread either by accident or design.
