Massive explosion rocks eastern China

[UPDATED]

Chinese state media say a huge explosion at a container port in the northeastern city of Tianjin has injured at least 300 people.

The state-run Beijing News said on its website that between 300 and 400 people had been admitted to hospitals in the city, east of Beijing.

It says the explosion shattered windows and knocked off doors of buildings in the area.

The explosion occurred in a warehouse for dangerous materials, and the logistics company running the warehouse reportedly had proper approval for the business.