The risk of conflict between nuclear-armed India and Pakistan rose dramatically on Wednesday (February 27).
Pakistan's armed forces say they've shot down two Indian jets only a day after Indian warplanes struck inside Pakistan.
On the same day the two sides exchanged artillery fire along their contested border in Kashmir, a spokesman for the Pakistani armed forces said they fired upon two Indian planes flying in Pakistani airspace.
One of the planes is thought to have fallen on India's side of Kashmir, the second reportedly came down in Paksitan-held territory and Pakistan claims two Indian pilots have been captured.
India's Foreign Ministry said Indian planes were engaged with Pakistani aircraft and they lost one MiG 21 fighter with a pilot missing in action.
Pakistan's Prime Minister Imran Khan urged dialogue with India saying both sides can't afford a miscalculation with weapons.
Kashmir lies at the heart of decades of hostility between India and Pakistan.
Both rule parts of the territory while claiming it all as their own.
The two countries have fought three wars since 1947 and world powers are urging restraint between the two nuclear armed rivals.
U.S. Secretary of State Mike Pompeo says he spoke to both foreign ministers on Tuesday (February 26).
China, the European Union, and New Zealand have also voiced concern over growing hostility between the two sides.
Relations deteriorated after a suicide bombing in India-controlled Kashmir mid-February.
The attack targetted Indian paramilitary officers, and was claimed by Pakistan-based militant group - Jaesh-e-Mohammed.
India accused Pakistan of harboring the militants, a claim Pakistan continues to deny.
And on Tuesday (February 26) India launched an airstrike on what it said was a militant training base operating in Pakistan.
It claimed a large number fighters had been killed while Pakistan claimed the strike was a failure and inflicted no casualties.
Pakistan says it launched its own air raid on Wednesday.
It's the first time in history that two nuclear armed powers have ordered airstrikes against one another.