ISLAMABAD: Pakistan has extended a ban on Indian-registered aircraft from using its airspace until late February, the Pakistan Airports Authority said on Wednesday, prolonging restrictions that have disrupted flight routes for Indian airlines.

Pakistan first imposed the restriction on April 24 as part of a series of tit-for-tat measures announced by both countries days after an attack in Indian-administered Kashmir.

New Delhi blamed the attack, which killed 26 tourists, on Pakistan. Islamabad denied any involvement and called for a credible, international investigation into the attack.

Tensions quickly escalated after India targeted several sites in Pakistan and Azad Kashmir, triggering intense missile, drone and artillery exchanges before a US-brokered ceasefire took effect on May 10.

“The ban on Indian flights has been extended till 5am on February 24,” the PAA said in a statement. “The ban will apply to aircraft owned, operated or leased by Indian airlines, including military flights.”

This marks the eighth extension of the ban, which has forced Indian airlines to reroute international flights, increasing fuel consumption, travel times and operating costs.

Last month, Pakistan accused India of blocking humanitarian assistance destined for Sri Lanka after Cyclone Ditwah, saying a special Pakistani aircraft carrying aid was forced to wait more than 60 hours for overflight clearance.

Pakistan later sent relief supplies and rescue teams to the island nation by sea, officials said.