Chinese authorities said the death toll from massive blasts in the Chinese Tianjin port has risen to 104.

A hazardous chemicals warehouse was devastated by a fire and series of explosions late Wednesday.

A total of 721 persons were injured in Tianjin blasts, including 58 people who were seriously injured.

The Chinese authorities have ordered the evacuation of residents within a 3km radius of the Tianjin blast site over fears of chemical contamination.

The evacuations came after an apparent change in wind direction, and as police confirmed the highly toxic chemical sodium cyanide was found near the site.