Security forces in Indian administered Jammu and Kashmir Saturday gunned down a top commander of terror outfit Hizbul Mujahideen (HM) in southern part of the state.News agency United News of India quoting Indian Defence Ministry spokesman at Srinagar (capital of Indian-administered Jammu and Kashmir) said Saturday that security personnel launched a joint operation at a village in south Kashmir district of Pulwama early Saturday morning. However, when the troops were about to storm a particular house in that village, militants opened fire and also hurled hand grenades. In the encounter between the security forces and terrorists, self-styled Battalion Commander of HM Bilal Ahmad Dar was killed, the spokesman said. One AK rifle and other arms and ammunition were recovered from the slain militant, the news agency reported.