Indian and Pakistani troops exchanged gunfire for a second straight day on Saturday as ties plummeted between the two nuclear-armed neighbours after an attack on tourists blamed on Pakistani militants killed 26 in India’s Kashmir region.

Axar.az reports, citing Reuters, the Indian Army said its troops responded to “unprovoked” small arms fire from multiple Pakistan Army posts that started around midnight on Friday along the 740-km de facto border separating the Indian and Pakistani areas of Kashmir.

The Indian Army said Pakistani troops had also opened up with sporadic fire around midnight on Thursday. No casualties were reported from the Indian side, it said.

Kashmir’s police have identified three suspects, including two Pakistani nationals, who carried out the April 22 attack. Pakistan has denied any involvement and its defence minister has said an international investigation was needed into the attack.