Memorial services have been held for 270 victims of the bombing of a Pan Am flight over the Scottish town of Lockerbie 25 years ago today.
UK authorities will be allowed to question Gaddafi's former spy chief over the Lockerbie bombing, Libya's Justice Minister told ITV News.
Gaddafi is dead, his regime swept away and his man, Megrahi will be buried unheralded.
Iran denied any involvement in the Lockerbie bombing in the face of the new allegations it contracted Palestinian and Syrian militants to carry out the attack.
New documents obtained by Al-Jazeera claim to show Iranian militants were behind the 1988 attack that killed 270 people. Foreign Ministry spokeswoman Marzieh Afkham told AFP:
We reject any claims of Iranian involvement in this act of terror. Iran's stance not only on this case but on all terrorist-related issues is quite clear: Iran flatly denies (links) to any act of terror.
Scotland's Crown Office says there is 'nothing new' in the latest claims that Iran was responsible for the Lockerbie air disaster.
– Crown Office spokesperson
"Mesbahi's claim that Iran was responsible was first reported in the media in the late 1990s and was available to the defence before the trial but they did not call him as a witness.
"The only appropriate forum for the determination of guilt or innocence is the criminal court, and Mr Megrahi was convicted unanimously by three senior judges. His conviction was upheld unanimously by five judges, in an Appeal Court presided over by the Lord Justice General, Scotland’s most senior judge.
"As the investigation remains live, it would not be appropriate to offer further comment."
A former Iranian intelligence agent has claimed in a new documentary that the Lockerbie bombing was ordered by Iran and carried by out a Syrian-based terror group.
Abolghassem Mesbah, a defector to Germany, told investigative journalists from Al Jazeera that the Supreme Leader, the Ayatollah Khomeini, ordered the bombing "to copy exactly what happened to the Iranian airbus"
The new claims, with supporting documents, will be broadcast tonight in a documentary called Lockerbie: What Really Happened? and will name key players said to be involved in the planning and implementation of the terror attack that killed 270 people in 1988.
A man who lost his daughter in the Lockerbie bombing has urged people to pray for the family of Abdelbaset al-Megrahi, the only man convicted of the attack.
Speaking at a memorial service in Westminster Abbey, Dr Jim Swire said:
When I first met the late Abdelbaset al-Megrahi face to face in Greenock prison, though he was a practising Muslim, he had bought me a Christmas card in the prison shop. In it he had written 'Dr Swire and family, please pray for me and my family'.
He died, my friend.
Over Christmas, if you pray, please pray for his innocent family but also for all those who wrestle with hatred, that they may be healed by God's love.
US Attorney General Eric Holder hailed the residents of Lockerbie, describing them as "generous" and "determined", as the 25th anniversary of the tragedy was marked in the UK and US today.
Mr Holder said that families and friends of the victims who then went on to fight a legal battle were "selfless". He added:
Although a quarter century has passed since the world was shaken and so many lives were devastated by a heinous and cowardly act of terror, no amount of distance or time can ease the pain or erase the loss that was inflicted on that day.
We keep calling for change and fighting for justice on behalf of those no longer with us. We rededicate ourselves and our nation to the qualities that define the men and women that we lost. And we continue to be drawn together on this day.
US Attorney General Eric Holder and other officials will speak at a ceremony at Virginia's Arlington National Cemetery to remember the 270 victims killed in the Lockerbie disaster. Flags were held by servicemen, as the names of those killed were read out.
Another remembrance service for the victims of the Lockerbie bombing has started at Westminster Abbey.
A silence will be observed at 7:03pm at the moment the bombing took place 25 years ago today.
The names of those killed in the Lockerbie bombing are being read out in a remembrance service at Arlington National Cemetery in the US state of Virginia.
A service is just beginning at Dryfesdale Church in Lockerbie to mark the 25th anniversary of the bombing.
The service, which has the theme 'Looking Forward', is being led by students from a scholarship programme between Lockerbie Academy and Syracuse University.
Some 35 students from the university, in upstate New York, were killed in the disaster.