The Kokkilai massacre was carried out by the Liberation Tigers of Tamil Eelam.
Incident
The Kokkilai village massacre is an incident on December 1, 1984, in which LTTE cadres massacred 11 Sinhalese civilians. This attack occurred on the day after the Kent and Dollar Farm massacres. Most of the victims were Sinhalese fishermen, were shot to death by LTTE cadres.
References
1984 Kokkilai massacre (LTTE) Wikipedia(Text) CC BY-SA