On Monday, a US court revealed new criminal charges for a second Libyan suspect in the 1988 terrorist attack that blew up Pan Am Flight 103.
The suspect is a former Libyan intelligence officer, Mohammed Abouagela Masud and was allegedly in charge of making the bomb that blew up flight 103, killing 270 people including 190 American citizens.
Abouagela has been charged with terrorism-related crimes, Attorney General William Barr said on Monday, 32 years after the atrocity. Prosecutors will seek the extradition of Masud to stand trial in the US.
In 2001, another Libyan intelligence officer, Abdel-Baset Al-Megrahi was convicted of the attack. He was given a life sentence but was released on humanitarian grounds in 2009 due to prostate cancer. He later died in Tripoli in 2012.
Last week, The Wall Street Journal reported that Masud was in custody in Libya and that the outgoing Mr Barr was seeking his extradition to the US to stand trial.
The attack on the London to New York flight remains the deadliest terrorist incident ever to have taken place in the UK, and the second deadliest air attack in US history. Eleven people on the ground in Scotland were also killed. The victims included 35 American students who were returning home for Christmas.