text: who was responsible for the assasination of rajiv gandhi?   the ltt killed him because he send the indian military troop to srilanka for fight against tigers. this action made ltt angry.  it was on july 29, 1987 that the indo-sri lanka agreement was signed. hostilities broke out between the ltte and the indian peace-keeping force in october 1987. the dmk came to power in tamil nadu in january 1989, that is, a year and a half after the agreement was concluded and fifteen months after the fighting began. actually this agreement was a trick of srilankan president jayawardhana.