Tens of thousands of police and soldiers fanned out across the region, which is claimed by both India and Pakistan, and erected checkpoints.

Security has been beefed up across Indian-controlled Kashmir a day after an attack killed at least 26 people, most of them tourists, as Indian forces launched a manhunt for the perpetrators of one of the deadliest attacks in the restive Himalayan region.

Kashmir Resistance,” a previously unknown militant group, claimed responsibility for the attack in two messages on social media.