A car bomb exploded Friday outside a Cairo police headquarters and another bomb rocked a subway station in the Egyptian capital, killing at least five people, state media reported. The car bomb in central Cairo killed at least four and wounded 51, state television said. One of the dead was a suicide attacker, the state-run newspaper al-Ahram reported online. The blast damaged the building and an Islamic art museum in the area of Bab al-Khaleq, part of medieval Cairo. Preliminary investigations showed that the attack had been carried out by a suicide bomber who tried to storm the police headquarters with an explosives-loaded car, police spokesman Hani Abdel-Latif said. "The guards on duty fired on him," he told state television. "The explosion occurred outside the building, causing damage to three floors of the building." A short time later, the blast outside the subway station occurred in the upmarket quarter of Dokki, according to the broadcaster. The blast, caused by a crude bomb, killed one person and injured at least 15.