AlHijjah 18, 1435, October 12, 2014, SPA -- Afghan security forces on Sunday killed two armed men after they stormed a police headquarters in northern Afghanistan, police said, according to dpa. "Two attackers, equipped with guns and bombs, stormed the dining hall of police headquarters in Mazar-e-Sharif city and engaged in clashes with police," said Sher Mohammad Durani, the police spokesman for northern province of Balkh. He said both the attackers had been wearing police uniforms. Four police officers were injured in the clashes and transported to a government hospital in Mazar-e-Sharif for treatment, officials said. No group has yet claimed responsibility for the attack.