The United Nations has urged India and Pakistan to exercise "maximum restraint" after they ramped up a tit-for-tat diplomatic offensive following a deadly attack on tourists in Indian-controlled Kashmir.

India's army chief will review security arrangements on Friday and visit the site of a deadly attack on tourists in Indian Kashmir earlier this week, an incident that has led to a fresh crisis with long-time rival and neighbour Pakistan.

India's military reported sporadic firing across the line of control in the disputed Kashmir region. The United Nations called for restraint from India and Pakistan. Pakistan fired across Kashmir line of control,