Nuclear rivals India and Pakistan exchanged lists of their nuclear sites Sunday in accordance with a 1988 agreement that prohibits the neighboring countries from attacking the locations, officials in Islamabad said.

Pakistan's foreign ministry confirmed that it turned in its list to the Indian High Commission, and received the same from New Delhi. There was no immediate comment from Indian officials.

Both countries recently returned to talks on conventional and nuclear weapons, Indian officials have said.

No major developments were expected from the high-level talks, which were held in Islamabad last week. The discussions were aimed at building confidence between the two nuclear powers, according to a December statement from the Indian Ministry of External Affairs.