Pakistan's troops resorted to heavy shelling and firing in RS Pura sector along the International Border in Jammu and Kashmir last night. Defence sources said, Pakistan's forces started unprovoked shelling targeting BSF posts in Abdullian, Karotana Khurd and Tubewell areas around 10 pm. BSF troops guarding the border retaliated the Pakistan's shelling. Heavy exchange of fire continued, when reports last came in.