Flames and smokes are seen after an oil tanker fell off a highway viaduct on Friday morning.

Rescue personnel are seen at the woodworking factory after an oil tanker set it ablaze on Friday morning.

The combination of photos show scenes of damaged factory and cars after the oil tanker blast.

Local officials are directing rescue operations at the accident place.

By Mei Jingya, Sina English

An oil tanker fell off a highway in Guangzhou, capital city of south China’s Guangdong province, at around 5:00 am Friday, setting ablaze dozens of cars and a woodworking factory under the viaduct.

At least 20 people, mostly workers of the factory, have been killed in flames. Further investigation is underway.

Local government officials have arrived at the site of accident to direct rescue operations.