At least 13 Egyptian policemen have been killed by unidentified gunmen who attacked a checkpoint on the Egyptian-Israeli border, officials say.

Israel said the attackers, who were in two vehicles, then tried to smash their way across the border.

At least 13 Egyptian policemen have been killed by unidentified gunmen who attacked a checkpoint on the Egyptian-Israeli border

The Israeli military said one vehicle was destroyed from the air, while the other blew up at the crossing.

It is not clear who carried out the border raid. Egyptian state television blamed Islamist militants.