Police investigating the Lockerbie bombing have met with Libyan defector Musa Kusa.
Former foreign minister Mr Kusa, who arrived in the UK last week, is believed to have been an intelligence officer at the time of the 1988 atrocity in which 270 people were killed.
Scottish police and prosecutors requested an interview with him at a meeting with Foreign Office officials on Monday.
A statement issued by the Crown Office and Procurator Fiscal Service (COPFS) said: "We can confirm that officers of Dumfries and Galloway Constabulary, supported by COPFS, today met Mr Musa Kusa in relation to the ongoing investigation into the Lockerbie bombing."
No details of the meeting were released "in order to preserve the integrity of the investigation", a spokesman said.
Mr Kusa was head of Colonel Muammar Gaddafi's intelligence agency from 1994 and a senior intelligence agent when PanAm flight 103 was blown up over Lockerbie. The Boeing 747 jumbo jet was en route from London to New York when it exploded over the Dumfriesshire town, killing 243 passengers, 16 crew and 11 residents.
Libyan Abdelbaset Ali Mohmed Al Megrahi was jailed for mass murder in 2001 but was returned to Tripoli in 2009 on compassionate grounds after doctors treating him for prostate cancer gave him an estimated three months to live.
As well as the Lockerbie bombing, shadow home secretary Yvette Cooper has led calls for Mr Kusa to be quizzed in relation to the murder of PC Yvonne Fletcher, who was shot during a protest outside London's Libyan Embassy in 1984.
The Libyan defector has also been accused of helping to arm the IRA, another subject that could be broached by potential interrogators.
Foreign Secretary William Hague told the Commons earlier this week that officials would encourage Mr Kusa to co-operate fully with all requests for interviews with investigating authorities.