Pakistan Rangers Sunday fired at an Indian border post in Jammu and Kashmir, triggering a gun battle, officials said.The Rangers opened fire at the R.S. Pura sector in Jammu district, targeting a Border Security Force (BSF) post on the international border.A police officer told IANS here that the Rangers fired three rounds at 10.50 a.m., once again violating the 2003 ceasefire between India and Pakistan on the Kashmir border.The BSF, whose 127 battalion was at the post, retaliated. No one was injured on the Indian side."The firing stopped immediately after the Rangers used small arms to target the BSF outpost," the officer said.Pakistan Saturday too violated the ceasefire in the same when the Rangers targeted a BSF post with a mortar shell. The mortar fell 300 meters away from the post.