Ninety-five people, 85 of them firefighters, are still missing four days after multiple blasts in the north-eastern port of Tianjin, Chinese authorities have said.
At least 112 people died in the blasts and hundreds have been hospitalised.
The explosions, in a warehouse containing hazardous chemicals, were so powerful that few of the recovered bodies have been identified.
Dozens of websites have been shut down for allegedly spreading rumours.
The state news agency Xinhua said 50 sites were accused of creating panic by publishing unverified information about the blasts, the Xinhua news agency reported.
Hundreds of social media accounts have also been closed down since the explosions on Wednesday.