China says Shanghai high-rise fire kills 42

China's official Xinhua News Agency says the death toll of a fire that engulfed a high-rise apartment building in China's business center of Shanghai has risen to 42.

The fire occurred on Monday at a building under renovation. Previous reports put the toll at at least eight dead and more than 90 injured.

A witness told Xinhua that building materials had caught fire, and the blaze spread to scaffolding and then to the 28-story building itself, which houses a number of retired teachers.

The government says more than 80 fire trucks were called to battle the fire, which appeared to have been put out after about six hours.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

Fire engulfed a high-rise apartment building under renovation in China's business center of Shanghai on Monday, killing at least eight people, injuring more than 90 and sending some residents racing down scaffolding to escape.

A witness said building materials caught fire, and the blaze spread to scaffolding and then to the 28-story building, which houses a number of retired teachers, the official Xinhua News Agency reported.

More than 80 fire trucks were called to battle the blaze, the government said in a statement, and streams of water could be seen flowing into the building, which appeared to be gutted.

The fire appeared to have been put out about six hours later, and firefighters could be seen taking bodies from the building.

Photos posted online showed a man clinging to the scaffolding. A building resident identified as Mr. Zhou told Hong Kong broadcaster Phoenix TV that he and his wife were napping in their 23rd floor apartment when they smelled smoke. He said they climbed down the scaffolding four stories before being rescued by firefighters.

At one point helicopters could be seen hovering over the building, and witnesses said at least one resident was rescued, but thick smoke hampered further efforts. By evening the helicopters were gone.

The city government said in a statement that 100 people were rescued, but it was not clear if that included the 90 people Xinhua said were hurt in the fire.

A doctor at Shanghai's Jing'an Hospital surnamed Zhang said more than 20 seriously hurt people had been admitted for treatment. Most of the survivors had suffered asphyxia from the smoke fumes, another doctor said.

Shanghai state television showed survivors at another hospital in the city, covered in thick blankets as they emerged from a high-pressure oxygen chamber. Many survivors described climbing down the scaffolding to escape.

The state-run news website Eastday.com cited a construction worker surnamed Qian who escaped from the 28th story as saying crews were installing energy-saving insulation when the fire occurred.

Qian said thick, rolling smoke clouds surrounded the building and the room she was in filled with smoke, making it difficult to breathe, the report said. She said she called the city's emergency hot line and then used a wet towel to cover her mouth and nose as she ran down a fire escape.

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Associated Press researcher Ji Chen in Shanghai and AP writer Gillian Wong in Beijing contributed to this report.