Video Shows Chinese Firefighters Pulling Survivor From Rubble After Tianjin Blast

The casualty toll from the massive explosion that devastated the Chinese port city of Tianjin this week has continued to rise, with at least 104 people now reported dead.

At least 720 others were injured in two giant blasts that ignited at a warehouse containing hazardous materials at the Tianjin Binhai New Development Zone at around 11:30pm local time on Wednesday. The initial eruption, which was reportedly sparked by "inflammables and explosives," set off more fires in the surrounding area.

On Friday, video emerged of responders rescuing a man trapped beneath rubble, according to China's state broadcaster. Another unidentified survivor was reportedly pulled out from a shipping container on Saturday.

Related: In Photos: The Aftermath of the Massive Explosion in the Chinese City of Tianjin

Authorities have evacuated residents within a 1.8-mile radius of the blast site, citing fears of chemical contamination. State media reported that the warehouse was storing more than 700 tons of sodium cyanide, a toxic chemical that can create a flammable gas when it comes into contact with water. Authorities were still rushing to clean up the chemical spill on Saturday, according to local media.

The two main explosions Wednesday are thought to have occurred roughly 40 minutes after firefighters responded to a fire in the area and attempted to put it out with water. At least 21 Chinese firefighters are among the dead. Several firefighters remained missing as of Saturday.

Some spot fires were still burning Saturday, and new smaller explosions could also be heard coming from the area around the blast site, according to witnesses.

It's still unclear why dangerous chemicals were stored in such large amounts — more than 70 times than legally allowed — and at such close proximity to homes and public buildings. Under Chinese law, hazardous materials must be stored at least 1,000 yards from residential areas and public infrastructure.

In the aftermath of the blasts, government officials have ordered authorities to examine storage of dangerous chemicals and explosives nationwide and "crack down unwaveringly on illegal activities to ensure safety."

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