About 400 South Asian migrant workers angered by a road accident battled police and set vehicles ablaze in Singapore’s worst rioting in decades, leaving 18 people injured, officials said Monday.

The violence erupted in the city-state’s crowded Little India neighborhood Sunday night after an Indian worker was hit and killed by a private bus driven by a Singaporean, police and government authorities told a news conference.

On Monday, Singapore Prime Minister Lee Hsien Loong was quick to condemn the violence:

Here we gather some of the best images taken during the riots from traditional and social media:

Riot police stand guard as a vehicle goes up in flames after a riot broke out in Singapore's Little India, Sunday. Pic: AP.

Riot police cordon off the area. Pic: AP.

The windscreen of an ambulance is smashed after Sunday's riots. Pic: AP:.

Police cars overturned in the street after Sunday's riot. Five police cars and an ambulance were damaged during the riots, according to local news reports. Pic: AP.