The Interior Ministry announced that a booby trapped LadaNiva car without plates went off Friday night near Ahmed Orabi metro station,killing a man.According to the ministry's media official, the car was driven by two men near themetro entry and exploded on Ramses St. downtown Cairo.The blast killed the driver, the official said in a statement.The official added that security forces intensify efforts to find out reason behind thebombing.Meantime, the health ministry confirmed the death of the man.No injuries were reported from the incident, the ministry said.