Pakistan Rangers Monday resorted to unprovoked firing at Indian positions on the international border in Jammu district, an official said.Police sources told IANS here that the Pakistani army opened fire at Border Security Force (BSF) posts at four places in R.S. Pura area of the international border early Monday."Pakistan Rangers fired at the Johra Post, Nowa Pind, Jogna Chak and Tent Post," a police officer said."The firing began at around 4.15 a.m. local time and it is still on," the officer said."BSF retaliated Pakistan firing effectively," the officer added.The Pakistan Army had violated ceasefire on the Line of Control (LoC) in Mendhar area of Poonch district Sunday.The LoC in Jammu and Kashmir is guarded by the army while the BSF guards the international border here.