The Pakistan army on Monday evening indulged in heavy shelling and firing along the Line of control (LoC) in Poonch district of Jammu and Kashmir, an official said."Unprovoked ceasefire violation by the Pakistan Army began at 7 p.m. today (Monday) in the Balakot sector. They are using mortars and our troops are effectively and appropriately responding," defence spokesman Colonel Manish Mehta told IANS here on Monday."No casualty in own troops was reported till the last reports came in, although exchange of firing was still on in the area," he said.