India took a raft of punitive diplomatic measures against Pakistan on Wednesday, accusing Islamabad of supporting “cross-border terrorism” after a deadly attack on civilians in Kashmir.

Axar.az reports, citing AFP, India’s measures, including the suspension of a key water-sharing treaty and closure of the main land border crossing with Pakistan, came a day after gunmen killed tourists in the Indian-administered part of disputed Kashmir.

Islamabad will make “a tit-for-tat response,” Pakistan’s Deputy Prime Minister Ishaq Dar said.

The gunmen killed 26 men — all Indian except one Nepali — in the deadliest attack on civilians in the Himalayan region for a quarter century.

Tuesday’s assault occurred as tourists enjoyed tranquil mountain views at the popular site at Pahalgam, when gunmen burst out of forests and raked crowds with automatic weapons.

Indian Foreign Secretary Vikram Misri on Wednesday read out a series of actions against Pakistan.

They included the suspension of the Indus Waters Treaty of 1960 to share critical water from Himalayan tributaries “until Pakistan credibly and irrevocably abjures (rejects) its support for cross-border terrorism,” Misri told reporters in New Delhi.

They also included the shutting of the main land border crossing and diplomatic staff reductions, including withdrawing several Indian personnel from Islamabad and ordering Pakistanis home.

Islamabad denies the allegation, saying it only supports Kashmir’s struggle for self-determination.

Pakistan’s foreign ministry on Wednesday offered its “condolences to the near ones of the deceased.”

“A comprehensive response will be given,” Pakistan’s Defence Minister Khawaja Asif said.

Asif said that India wants to “use this incident, which we deplore, as an excuse” to exit the water accord.