ISLAMABAD (AP) — Pakistan's prime minister pledged on Thursday his country would release a captured Indian jetfighter pilot the following day, a move that could help defuse the most-serious confrontation in two decades between the nuclear-armed neighbors over the disputed region of Kashmir.

Prime Minister Imran Khan made the announcement in an address to both houses of Parliament, saying he tried to reach his Indian counterpart Narendra Modi on Wednesday with a message that he wants to de-escalate tension.

There was no immediate reaction from India, though Modi earlier in the day warned that "India's enemies are conspiring to create instability in the country through terror attacks."

"We are releasing the Indian pilot as a goodwill gesture tomorrow," Khan told lawmakers. He did not say whether the release was conditional.

The Pakistani premier also said that he had feared Wednesday night that India might launch a missile attack, but the situation was later defused. He did not elaborate.

World powers have called on the nations to de-escalate the tensions gripping the contested region since a Feb. 14 suicide bombing killed over 40 Indian paramilitary troops in Kashmir in territory it controls. India responded with a pre-dawn airstrike on Tuesday inside Pakistan, the first such raid since the two nations' 1971 war over territory that later became Bangladesh.

The situation then escalated further with Wednesday's aerial skirmish, which saw Pakistan say it shot down two Indian aircraft, one of which crashed in Pakistan-held part of Kashmir and the other in India-controlled Kashmir. Pakistan later aired a video of a man it identified as the Indian pilot.

India acknowledged one of its MiG-21s, a Soviet-era fighter jet, was "lost" in skirmishes with Pakistan. India's Ministry of External Affairs said late Wednesday that it "strongly objected to Pakistan's vulgar display of an injured personnel of the Indian Air Force," and that it expects his immediate and safe return.

India also said it shot down a Pakistani warplane, something Islamabad denied.

Kashmir has been divided but claimed in its entirety by both India and Pakistan since almost immediately after the two countries' creation in 1947. They have fought three wars against each other, two directly dealing with the disputed region.

Both Indian and Pakistani officials reported small-arms fire and shelling along the Kashmir region into Thursday morning. There were no reported casualties.

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Associated Press writers Aijaz Hussain in Srinagar, India, Ashok Sharma and Emily Schmall in New Delhi, Roshan Mughal in Muzafarabad, Pakistan, Adam Schreck in Hanoi, Vietnam, and Jon Gambrell in Dubai, United Arab Emirates, contributed to this report.