NEW DELHI — Sri Lanka deployed additional troops to one of the cities where the Easter Sunday bombings took place, after clashes there late Sunday between Muslims and Sinhalese.

In a sign of how raw emotions remain after the deadly attacks last month that killed more than 250 people, the clashes in Negombo, a city about 20 miles north of the capital, Colombo, started out as a traffic incident before quickly escalating into mob violence.

Three auto-rickshaws and two motorcycles were burned before the mob ransacked several homes belonging to local Muslims.

Hilmy Ahmed, the vice president of the Muslim Council of Sri Lanka, said “a few houses” had been damaged in the violence. He said the unrest was brought under control after police commandos, the air force and the army sent troops to the area and the government imposed a curfew immediately after the clashes. Mr. Ahmed said one of the drivers involved in the traffic altercation had been drunk.