Shelling across the border between India and Pakistan killed two Pakistani civilians, an Indian soldier and a boy, military officials from the two sides said on Monday, as tension between the nuclear-armed neighbours simmers. Pakistan's military said the shelling hit the sectors of Harpal, Pukhlian and Charwah along the disputed 'working boundary', which separates Pakistan's Punjab province from Indian-administered Kashmir's Jammu region. India's military said the firing occurred in the Pura, Pargwal and Kanachak sectors.