A deadly attack on tourists in the disputed Kashmir last week has plunged relations between India and Pakistan to new lows, with both sides hinting at imminent military action.

Indian Prime Minister Narendra Modi has vowed to pursue the assailants behind last month's attack on tourists in Kashmir to the "ends of the earth".

NEW DELHI (Reuters) - India's foreign minister said he has told Secretary of State Marco Rubio that perpetrators of the deadly attack in Kashmir last week should be brought to justice, as the U.S. sought to calm tensions between nuclear-armed India and Pakistan.