The Islamic State group has claimed responsibility for an attack that killed at least 13 policemen in Egypt's Sinai Peninsula.

A mortar attack hit a checkpoint in the city of El-Arish.

But the group claimed a suicide bomber blew up a car with explosives at the checkpoint, which it then raided.

Jihadist militants have killed hundreds of security personnel in Sinai since the military overthrew President Mohammed Morsi in 2013.