A senior police officer said the restrictions were imposed to prevent an escalation of violence after attacks occurred in Negombo - north of Colombo - where over 100 people died in a church bombing.
"About two cycle of violences and a three-wheel taxi had been damaged in the festivities," the police officer told AFP.
"We declared a curfew till 7.00 am (0130 GMT) to contain the unrest," he added.
There were no immediate reports of casualties.
The country’s main international airport is located in the area, but police said there was no disruption to airport traffic.
The officer said an investigation was underway into the festivities, the first violence between Moslems and Christians since the Easter Sunday attacks targeting three churches and three luxury hotels in the country.
| Al Ahram adds: |
like lava from a volcano between groups of civilians in Negombo.