(AP) -- Hashem Abedi, the brother of the bomber, is in custody in Libya.
Police said Wednesday night that an extradition request was given to Libyan authorities earlier Wednesday.
Hashem Abedi is the brother of Salman Abedi, who set off the bomb during an Ariana Grande concert on May 22 that left 22 dead and hundreds wounded.
Salman Abedi blew himself up in the attack.
Police say the warrant for Hashem Abedi relates to the murder of 22 people and the attempted murder of others.
The warrant was issued by a Westminster Magistrates' Court judge and approved by the Home Secretary.
(Photo: Hashem Abedi, brother of the Manchester Arena bomber, inside the Tripoli-based Special Deterrent anti-terrorism force unit. Photograph: Reuters)