UPDATED: Foreign correspondent Jon Stephenson is in Dujiangyan, China, which is about 100 kilometres from Wenchuan, the epicentre of Monday's 7.9-magnitude quake. He filed the following images taken at the Juyuan Middle School in Juyuan Township where 900 students were buried under rubble.

The death toll continues to climb with conservative estimates suggesting more than 40,000 people are dead, missing or buried in the rubble. Survivors are concerned that dangerous cracks have appeared in several hydro dams and reservoirs around the earthquake zone and fear another disaster could be looming.

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One hundred bodies remain trapped beneath the rubble of Juyuan Middle School. One of them is a relative of this young girl.

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A Dujingyan resident looks through the rubble.

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In Monday's earthquake in China's Sichuan province, classrooms at the Juyuan Middle School at Dujiangyan were reduced to rubble.

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A Western television cameraman films the rubble of the Juyuan Middle School at Dujiangyan.

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A Chinese medical officer sprays the area around Juyuan Middle School to prevent disease from spreading.

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Picture of the rubble at the Juyuan Middle School in Dujiangyan.

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One of the classrooms that remain standing at Juyuan Middle School. Note the picture on the blackboard depicts someone running with the Olympic torch.

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The last lesson held in this Juyuan Middle School class before the earthquake struck was an English lesson.

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Rescue workers and resident wait anxiously at the Juyuan Middle School in Dujiangyan, where dozens of students are buried in the rubble. There is little hope any remain alive.

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Dujiangyan residents light candles at the Juyuan Middle School in memory of students killed in the recent earthquake.

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Firecrackers explode near the rubble of the devastated Juyuan Middle School at Dujiangyan. Residents set off the firecrackers at the school in memory of quake victims and to ward off evil spirits.

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Chinese television crew film a building at Dujiangyan that was severely damaged in the recent earthquake. Some residents escaped the building, but others are trapped under the rubble. Chinese search and rescue officials say there is now little hope any remain alive.

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A rescue worker with his German Shepherd dog at Dujiangyan prepares to enter the rubble of a building to search for bodies or signs of life.

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Property damage at Dujiangyan.

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Residents of the earthquake-stricken city of Dujiangyan pass a home devastated in the earthquake that struck Sichuan province on Monday May 12, [local time].

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This apartment building at Dujiangyan was severely damaged in the earthquake. It will eventually be demolished.

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Rescue firemen enter a building in Dujiangyan in search of survivors. Their commander later said there was no hope anyone was alive in this building.

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A rescue fireman about to follow a colleague searching for survivors at an apartment building in the earthquake-striken city of Dujiangyan.

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A rescue fireman searches through the rubble for survivors or dead bodies.

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Chinese journalists question the commander of rescue firemen searching for bodies at an apartment building in Dujiangyan. The commander has just told relatives of those trapped inside that "There is no chance of life."

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A military helicopter ferries relief assistance to the earthquake-stricken city of Dujiangman, in China's Sichuan province.