The 1985 massacre in Muttur was a slaughter of Tamil civilians in the town of Muttur in Eastern Province, Sri Lanka. The massacre occurred when all three divisions of the Sri Lankan military attacked the town by land, air and sea. The motive of the attacks was deliberately aimed at slaughtering ethnic Tamils, who formed the local population in the region. The killings lasted for 3 days from 8 November to 11 November.