Footage of two massive explosions in the Chinese city of Tianjin, taken by a stunned eyewitness, captured the fear and terror of those who saw what happened.

Dozens of people died and hundreds were injured when a warehouse owned by a company specialising in handling hazardous goods caught fire and exploded.

City officials say they still did not know what materials were at the warehouse at the time of the fire, or what caused the blasts.

Eyewitness Dan van Duren filmed the moment of the explosions, before he and others fled to avoid the danger.