East Libyan forces say took part in Egyptian strikes in Derna

East Libyan forces said they participated on Friday in air strikes launched by Egypt on the Libyan city of Derna, following a deadly attack on Christians in central Egypt earlier in the day.

The East Libyan air force's media office said in a statement that the strikes had targeted forces linked to al-Qaeda at a number of sites, and would be followed by a ground operation.

A resident in Derna told Reuters they had heard four powerful explosions, and that the strikes had targeted camps around Derna used by fighters belonging to the Majlis al-Shura militant group.