 On 30 April, the Soviet troops and OMON converged toward Getashen and Martunashen, which were approximately twenty-five kilometers north of Karabakh, meeting little, if any, resistance on the way.Accompanying the normal ground troops were an assortment of tanks, armored personnel carriers, artillery and attack helicopters.While approaching the villages in Shahumyan, the military would announce their intended actions with a loudspeaker and called for the inhabitants to display proof of their citizenship (known as a "passport-regime" check) in an effort to root out the "fedayeen" groups led by Tatul Krpeyan, a local schoolteacher.