Cairo - A secuirity checkpoint in Northern Sinai, Egypt was attacked earlier by a suicide bomber who drove into it in a vehicle packed with explosives. Militants then proceeded to open fire with grenade launchers. Egypt's Interior Ministry said the attack was carried out by a group of around 20 men who had used RPGs and a vehicle bomb. Security forces had detonated the bomb before it reached the checkpoint, and had killed five of the attackers and wounded three others. Four civilians were reportedly injured. Three floors of the police building were blown out, the officials said, adding that so far, bodies of 10 people — all but one of them policemen — have been retrieved from the rubble but that they fear the death toll could rise further. The wounded were taken to hospital.