BEIJING (AP) -- A tanker truck filled with gasoline has collided with a truck in southern China, setting off an explosion and a massive fire that left 20 people dead and 14 others hurt.

The official Xinhua News Agency says the tanker truck was carrying 40 tons of gasoline when it crashed into the other vehicle early Friday morning on an expressway in Guangzhou city.

Xinhua says oil leaked from the tanker truck and triggered an explosion that set a timber mill under the expressway bridge on fire.

Xinhua says one of the 14 injured was severely hurt. Most of those hurt were workers from the factory.

The agency cited the Guangzhou city's Internet information office.