A British court on Thursday sentenced the younger brother of the main suspect in the 2017 terrorist attack at Manchester Arena to a minimum of 55 years in prison for the murder of 22 people.

Prosecutors said Hashem Abedi, 23, was in Libya at the time of the attack,  but he became the first suspect to be extradited from the country to Britain in July 2019.

The prosecutors said the brothers bought a car two days before flying to Libya, using it to store bomb-making equipment until the main suspect, Salman Abedi, returned to Britain shortly before the attack.

Salman Abedi died after detonating explosives in his luggage in a foyer at the arena, killing 22 people and injuring hundreds after a performance by U.S. singer Ariana Grande.

Sentencing judge, Jeremy Baker, told London’s Central Criminal Court that Hashem Abedi had taken an integral part not only in the planning of such an event but in participating in its preparation.

Baker said he was satisfied that the decision to detonate the improvised explosive device at the concert had already been made, whilst the defendant had been with his brother in Libya.

Police said they believed Salman Abedi was part of a terrorist network.

Prosecutors said Hashem Abedi encouraged and helped his brother and had blood on his hands even if he didn’t detonate the bomb.

According to British media, the parents of the Manchester-born Abedi brothers were given asylum in Britain after they fled the regime of former Libyan leader Moamer Gaddafi.