An explosion has reportedly occurred near a military hospital in Wazir Mohammad Akbar Khan area on the outskirts of Kabul, with reports of gun firing on Wednesday. Gunmen attacked the military hospital in an area close to the U.S. Embassy, said witnesses. However, there is no information regarding the type of the explosion. According to the sources, a gun battle is underway inside the hospital as unknown numbers of militants have managed to infiltrate inside the hospital. No casualties have been reported so far.