LTTE had executed prisoners of war on a number of occasions , in spite of the declaration in 1988 , that it would abide by the Geneva Conventions . One such incident was the mass murder of 600 unarmed Sri Lankan Police officers in 1990 , in Eastern Province , after they surrendered to the LTTE on the request of President Ranasinghe Premadasa . In 1993 , LTTE killed 200 Sri Lanka Army soldiers , captured in the naval base at Pooneryn , during the Battle of Pooneryn . In 1996 , LTTE executed 207 military officers and soldiers who had surrendered to the LTTE during Battle of Mullaitivu ( 1996 )
600 unarmed Sri Lankan Police officers
1990 massacre of Sri Lankan Police officers
Liberation Tigers of Tamil Eelam