India and Pakistan have exchanged lists of their nuclear facilities as part of a 1988 pact that bars them from attacking each other's nuclear installations.

An Indian External Affairs Ministry statement says the exchange, both in New Delhi and Islamabad, has been each New Year's Day since 1992.

The Indian ministry also said Wednesday that both countries exchanged lists of prisoners held in their jails who are citizens of the rival country. The ministry but gave further no details.

India and Pakistan have fought three wars since they won independence from Britain in 1947. They have been trying to improve relations seriously damaged by the Mumbai terror attack in 2008 that killed 166 people. India blamed the attack on Pakistani insurgents, a charge Pakistan denies.