The ISIS group has claimed responsibility for an attack that killed at least 13 policemen in Egypt's restive Sinai Peninsula. Officials said that a mortar attack hit a checkpoint in the city of El-Arish, according to the (BBC). But the group claimed a suicide bomber blew up a car with explosives at the checkpoint, which it then raided. Egypt's Interior Ministry said the attack hit the Safa checkpoint in northern Sinai. Witnesses reported hearing a massive explosion and said the city had been sealed off. Government forces later killed five of the militants who carried out the attack, officials said. The group has claimed numerous deadly attacks in the region recently, targeting mainly security forces. It has also said it was responsible for the bombing of a Russian airliner over Sinai in October that killed all 224 people on board.