ISLAMABAD, Pakistan (AP) – Pakistan and India exchanged lists of their nuclear facilities Thursday, honoring an agreement that prohibits the countries from attacking each other’s nuclear installations, said Pakistan’s Foreign Ministry.

Pakistan and India have routinely exchanged these lists on the first day of the year since 1992 under an agreement that was signed in 1988.

Thursday’s exchange came at a time of high tension between the nuclear-armed nations following the November attacks in Mumbai that left 164 people dead.

India has blamed Pakistani militants for the attacks. Pakistan has promised to punish those involved but has demanded India share evidence to support its accusations.