The five individuals, found charred in a van in Dankotuwa, were killed in Makadura market, Pannala, latest information reveals.
A spokesperson to the CID said the five men who were arrested yesterday, have confessed to the murders.
Initial investigations revealed that the men were killed over a ransom demand.
Meanwhile, businessmen at the Makadura market has informed the police regarding several bloodstains found there.
The arrested men were taken to the crime scene and they had confessed to how the killings were carried out.