The first additional district and sessions court judge Poornima today convicted and sentenced them to life for stabbing to death a 38-year-old refugee at Vazhavandhan Kottai refugee camp on October 5, 2013.
The prosecution case was that the man was murdered following a quarrel with four others during a funeral.
A case was registered and three arrested the same day, while another was absconding.
The Judge said the prosecution had proved with sufficient evidence and material that the refugees had committed the murder.