In 1987 the government of Sri Lanka and India entered into an agreement and invited the Indian Army to be used as peacekeepers . Eventually the Indian Peace Keeping Force ( IPKF ) came into conflict with one of the rebel groups namely the Liberation Tigers of Tamil Eelam ( LTTE ) . During October 1987 the Indian forces trying to wrest control of the Jaffna town stormed the Jaffna hospital resulting in the deaths of a number of staff and patients . By November 1987 the Indian Army was in nominal control of all major towns within the Jaffna Peninsula . But the LTTE after removing most of its fighting cadres south of the peninsula maintained a steady barrage of typical guerilla style attacks throughout 1988 and 1989 . This period also saw huge loss of civilian life , claimed rapes and number of instances of mass massacres
resulting
Jaffna hospital massacre
1989 Valvettiturai massacre