ISLAMABAD - Pakistan and India Tuesday exchanged lists of their nuclear installations and facilities as part of an agreement that bans the two countries from attacking each other’s nuclear assets.Both the governments also exchanged the lists of prisoners in each other’s custody.  Under Article-II of the Agreement on Prohibition of Attacks against Nuclear Installations and Facilities signed between Pakistan and India on December 31, 1988, the two governments are required to exchange lists of their respective nuclear installations and facilities on annual basis. Accordingly, a list of facilities in Pakistan was officially handed over to a representative of the Indian High Commission at the Foreign Office on Tuesday at 11:30 hrs (PST). The Indian side also handed over its list to the Pakistan High Commission in New Delhi at 12:00 hrs (IST).Pakistan has previously maintained that its nuclear weapons capability is a deterrent against India’s much larger conventional military. Both the countries are not signatories to the nuclear non-proliferation treaty. However, Pakistan as a responsible nuclear state has taken stringent measures to control exports of nuclear materials.Pakistan and India have been developing missiles of varying ranges since they conducted nuclear tests in May 1998.Pakistan has recently test-fired a nuclear-capable ballistic missile with a range of 1,300 km. The military said the Hatf-V Ghauri missile was a liquid fuel missile, which could carry both conventional and nuclear warheads.In a related development, Islamabad and New Delhi also exchanged the lists of prisoners in each other’s custody. According to the Agreement on Consular Access signed between Pakistan and India on May 21, 2008, both countries are required to exchange lists of prisoners in each other’s custody twice a year - on 1st January and 1st July, respectively. Consistent with the provisions of the agreement, the Ministry of Foreign Affairs handed over the list of Indian prisoners in Pakistan to the Indian High Commission in Islamabad on Tuesday. India and Pakistan have fought three wars since their independence in 1947. Relations between the two neighbours have improved considerably during last one and a half years.