(CNN) -- A blast at an internet cafe in southern China killed six people and injured 34 others Saturday night, state-run media reported.

The explosion occurred around 10:30 p.m. in downtown Kaili City, located in Guizhou province, according to Xinhua, citing the province's public security department.

Police are still trying to determine what caused the incident.

Pictures from the scene show the building torn to shreds, its contents largely unrecognizable and many walls ripped down. Rescue workers said the windows of nearby residential buildings were also blown out.

Emergency personnel pulled several victims from the debris and ambulances transported those hurt to nearby hospitals, according to the public security department. The search continued late into the night for victims and survivors.

Kaili is an inland city in the Miag-Dong Autonomous Prefecture of Qiandongnan, about 175 km (108 miles) east of Guiyang.