A gymnasium roof collapsed in a school in China on Sunday, claiming ten people's lives.

Iran press/ Asia: At least 11 people were killed after a concrete roof collapsed on a number of people at a school gymnasium on Sunday, state media reported on Monday.

Six of those died after attempts to treat them failed, state broadcaster CCTV reported.

Around 15 people had initially been thought to have been trapped under the debris, but authorities pulled around 14 individuals from the rubble. Their ages are not known yet.

"A search and rescue operation involving nearly 160 firefighters and 39 fire trucks has been launched," the broadcaster said.

People in charge of the construction companies were arrested.

According to the provincial fire and rescue department, according to CCTV, the accident occurred at around 2:56 p.m. local time Sunday (0656 GMT).

State-run news agency Xinhua said construction workers had placed perlite — volcanic glass — on the roof. An initial investigation found that heavy rain had caused the perlite to expand, thus bringing down the roof.

"Those in charge of the construction company have been taken into police custody," the broadcaster said.

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