India's army said "unprovoked" small arms firing was carried out by "multiple" Pakistan army posts "all across the Line of Control in Kashmir" overnight from Friday to Saturday.

"Indian troops responded appropriately with small arms," it said in a statement. "No casualties reported."

There was no immediate confirmation from Pakistan, but the two sides had confirmed gunfire between their respective forces the previous night.

Relations between the nuclear-armed rivals have plunged to their lowest level in years.

New Delhi accuses Islamabad of supporting "cross-border terrorism" after gunmen on Tuesday killed 26 men in the worst attack on civilians in India-run Kashmir for a quarter of a century.

Islamabad denies involvement, and calls attempts to link Pakistan to the attack at Pahalgam "frivolous".

The United Nations has urged the neighbours, who have fought multiple wars in the past, to show "maximum restraint".

US President Donald Trump has downplayed the tensions, saying that the dispute will get "figured out, one way or another".

Kashmir has been divided between India and Pakistan since their independence in 1947. Both claim the territory in full but govern separate portions of it.

Rebel groups have waged an insurgency in Indian-controlled Kashmir since 1989, demanding independence or a merger with Pakistan.