Several Asian airlines have announced they were re-routing or cancelling flights to and from India and Pakistan, as the two neighbouring countries are racked by the deadliest exchange of fire in the last two decades.

Navigational data on Wednesday indicated that the airspace over northern India and southern Pakistan had been completely cleared. Pakistan’s entire airspace was nearly free of civilian aircraft, barring a few flights.

Sanad, Al Jazeera’s verification agency, monitored Indian military aircraft flying over northern India and a Pakistani government aircraft in the south of the country via air navigation tracking sites. This occurred just hours before the airspace was entirely cleared, coinciding with several flights diverting their routes from Pakistan.

According to FlightRadar24, which monitors flights worldwide, 52 flights to and from Pakistan were cancelled as of Wednesday morning.

There were 57 international flights operating in Pakistan’s airspace when India struck, according to a Pakistan army spokesperson.