Two Libyans have been identified as suspects in the 1988 Lockerbie bombing in which 270 people died.
Investigators say the two suspects were accomplices of Abdelbaset al Megrahi, the only person yet to have been convicted of the crime.
Scottish officers and FBI agents are preparing to travel to Libya to interview the men.
Pan Am 103 was on its way from London to New York and had just taken off when a bomb exploded, killing everyone on board and 11 people on the ground, on December 21, 1988.
Al Megrahi was jailed for life years in 2001 but was released from jail by the Scottish Government in 2009 on compassionate grounds after being diagnosed with prostate cancer.
He died in Libya in 2012.
