Reports in China say a flood that swept through a primary school in the northwestern city of Ning'an last week may have killed as many as 200 people.
The official death toll stands at 92, including 88 children.
Authorities say 17 people are missing.
At the weekend, local villagers held demonstrations around Ning'an to protest at the inefficiency of the rescue operation and demand a full investigation.
Hong Kong's South China Morning Post said many villagers had already found their children's bodies by the time the rescue teams had arrived.
China suffers widespread flooding every year, causing huge loss of life.
Last week, heavy rains in southern China killed more than 200 people and destroyed nearly 138,000 homes.
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