MOSCOW (AFP) - Seven soldiers were killed on Tuesday by an explosion of ammunition in the war-ravaged southern Russian province of Chechnya, Russian news agencies reported, citing the Defence Ministry. "Today at 5:15 pm (1315 GMT)... an uncontrolled explosion occurred as ammunition was being transferred from a tank into a vehicle" near the town of Shali, a defence ministry statement was quoted as saying. "Seven servicemen were killed and six were injured," the statement added. Prosecutors have opened an inquiry into the explosion and Defence Minister Anatoly Serdyukov dispatched a special investigative commission to look into the incident, the reports said. Chechnya has fought two wars for independence from Russia since the collapse of the Soviet Union. Guerrilla attacks remain frequent despite the end of major combat operations in the latest conflict, which began in 1999. Russia continues to have thousands of troops stationed in the province.