The death toll from massive explosions in China's port city of Tianjin has risen to 112 and 95 people are missing, the official Xinhua news agency said on Sunday, suggesting the toll could rise significantly.
Eighty-five of the missing from Wednesday's disaster are fire fighters.
President Xi Jinping on Saturday urged authorities to improve safety and learn lessons paid for with blood.
China evacuated residents who had taken refuge in a school near the site of the blasts on Saturday after a change in wind direction prompted fears that toxic chemical particles could be blown inland.
It was not clear from media reports how many people were evacuated, but the order came as a fire broke out again at the blast site, a warehouse specially designed to store dangerous chemicals, according to Xinhua. It was also not immediately clear if that threat of toxic pollution persisted on Sunday.
Some 6,300 people have been displaced by the blasts with around 721 injured, Xinhua said earlier. Shockwaves from the explosions were felt by residents in apartment blocks kilometers away in the city of 15 million people.
SURVIVOR FOUND
In one piece of encouraging news, a 50-year-old man was rescued 50 meters away from the blast zone, Xinhua said. The man was suffering from a burnt respiratory tract but was in a stable condition after surviving three days in a shipping container, the official China Central Television (CCTV) and Xinhua said.
Chinese police confirmed for the first time the presence of deadly sodium cyanide at the site of the blast as a series of new, small explosions were heard and small fires broke out.
Police confirmed the presence of the chemical, fatal when ingested or inhaled, "roughly east of the blast site", the state-run Beijing News said.
It did not say how much had been found or how great a risk it posed but residents expressed concern about the air and water.
"I do feel a bit afraid," said construction worker Li Shulan, 49, when asked about the air quality. "It definitely doesn't feel good. As you can see our boss is making us wear masks."