Egypt deepened its involvement in the fight against Islamist militias who have taken over key parts of Libya on Wednesday, with officials saying Egyptian warplanes have bombed their positions in the eastern city of Benghazi.

The two officials, who have firsthand knowledge of the operation, said the use of the aircraft was part of an Egyptian-led campaign against the militiamen that will eventually involve Libyan ground troops recently trained by Egyptian forces.

The operation, they said, was requested by the internationally recognized Libyan administration based in the eastern city of Tobruk. That elected administration was thrown out of the capital, Tripoli, by rival militias allied with Islamic political factions. […]