The Agni missile (Sanskrit: अग्नि, Agnī, "fire" and also the Hindu god of fire) is a family of medium to intercontinental range ballistic missiles developed by India, named after one of the five elements of nature. Agni Missiles are long range, nuclear weapons capable surface to surface ballistic missile. The first missile of the series, Agni-I was developed under the Integrated Guided Missile Development Program and tested in 1991. After its success, Agni missile program was separated from the IGMDP upon realizing its strategic importance. It was designated as a special program in India's defence budget and provided adequate funds for subsequent development. As of 2008, the Agni missile family comprises three deployed variants while two more variants are under testing: