Early Sunday, gunmen opened fire inside a South African pub, killing nine people and wounding at least 10 others, sparking a manhunt for the attackers in the country’s second such incident in less than a month.

The shooting took place just before 1 a.m. at KwaNoxolo tavern in Bekkersdal, a township located 28 miles Police said about 12 unknown suspects in a white mini-bus and a silver sedan opened fire at pub patrons and continued to shoot randomly as they sped away from the scene.

“Some victims were randomly shot in the streets by unknown gunmen,” police said.

, Gauteng’s acting provincial commissioner, told The Associated Press that the gunmen, some of whom covered their faces with balaclavas, were armed with an AK-47 rifle and several 9mm pistols.

Authorities have launched a for the suspects, led by Gauteng’s Serious and Violent Crime Investigations unit in coordination with the Crime Detection Tracing Unit.

The attack follows a string of mass shootings at bars — often called shebeens or taverns in South Africa. Earlier this month, multiple gunmen opened fire at an unlicensed bar near the capital, killing at least 12 people and injuring 13 others.