Pakistan prepared to release a captured Indian pilot on Friday as the nuclear powers scaled back their confrontation, and said it would reopen its airspace to commercial flights.

World powers have urged restraint from the two nations as tensions escalated following a suicide car bombing that killed at least 40 Indian paramilitary police in Indian-controlled Kashmir on Feb. 14.

The United States has been actively mediating, to avert any risk of the two countries sliding toward their fourth war since independence from British colonial rule in 1947. The disputed Himalayan region of Kashmir has been at the root of two of those conflicts.