Indian and Pakistani troops are battling for control of a border area in the Kashmir region and have exchanged heavy fire at a frontier pass, the Press Trust of India reported. The news agency, reporting that Pakistan has moved troops, armor and artillery into the region, said there were no Indian casualties. An Indian newspaper, the Tribune, reported that Pakistani planes strafed Indian positions on the 18,000-foot-high Siachen Glacier. There was no comment from Pakistan. Since independence in 1947, India and Pakistan have frequently clashed over the divided Kashmir region.