The situation in Gintota in Galle was under control following an overnight curfew, the Police said.
The Government meanwhile called for calm and urged the public not to fall prey to attempts to create communal tensions in the area.
Over 100 Police Special Task Force commandos and over 200 policemen were deployed to Gintota last evening following mob violence in the area.
The violence involved two groups and the situation escalated with houses and at least one place of worship being attacked.
The Police made several arrests following the incident and imposed a curfew till 9am today.