A curfew was imposed in Negombo following clashes between two groups, the Police said.
The clash broke out over a personal dispute but later escalated, resulting in property, including vehicles being damaged.
The Police and military were deployed to bring the situation under control.
Police Spokesman Ruwan Gunasekera said that a curfew was imposed from tonight to 7am tomorrow as tensions prevailed in the area.
He also warned that tough action will be taken against anyone inciting communal clashes.