Three JeM terrorists, including two top commanders believed to be behind the Pulwama terror attack, were killed in a fierce 16-hour encounter, in which an Army major and four security forces personnel lost their lives in south Kashmir on Monday. A civilian died in the crossfire during the gun battle in the Pinglan area of Pulwama district, 12 km from the spot of the February 14 attack on CRPF personnel which claimed the lives of 40 jawans, officials said. Deputy Inspector General of Police (South Kashmir) Amit Kumar, a Brigadier, a Lt. Colonel, a Major and four other ranks of the Army unit which carried out the operation suffered injuries, they said.