Multiple blasts were heard in Jammu city in Indian Kashmir for the second day on Friday, and projectiles seen in the night sky after a blackout, two Reuters witnesses said.

Drone attacks were repulsed in Jammu, Samba, Barmer, Pokhran, Ferozepur, Rajouri, Phalodi, Barmer, Jaisalmer, Gurdaspur, Hoshiarpur, Amritsar.

Pakistan on Thursday attempted to target Jammu airport, prompting counter-measures and a total blackout in Jammu city and surrounding areas, according to ANI, PTI reports. Eyewitnesses reported loud explosions and sirens in Jammu,

India has threatened before, in other moments of rising tensions, to pull out of the Indus Waters Treaty, which both countries signed in 1960. If India follows through this time, it could restrict the flow of water that is used for most of Pakistan’s crop irrigation and human consumption. Agriculture represents one-fourth of the country’s economy.

India and Pakistan’s latest military conflict has expanded, days after India carried out airstrikes in Pakistan that followed an attack by gunmen on tourists in India-controlled Kashmir last month