Health officials in China are investigating four anesthesia-related fatalities, including the death of a 3-year-old boy, at a hospital in the eastern province of Fujian.

All four patients underwent operations for various conditions at the No. 2 Hospital of Sanming City between Sept. 3 and Oct. 11, Xinhua news agency reported on Tuesday.

In addition to the 3-year-old boy, the victims included a 26-year-old man, a 29-year-old man and a 44-year-old woman.

"Local health and drugs supervision authorities are investigating the cause of the incidents,” a hospital spokesman told the news agency. “Samples of the drugs used in the operations are being tested.”

A panel of health experts, sent by the Ministry of Health, has since arrived at the hospital to join the investigation.

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