“Unconfirmed substance” was spilt at the labs in Addenbrooke’s Hospital in the UK city of Cambridge, the Cambridgeshire Fire and Rescue Service said Monday.

“At 11.20am on Monday September 2, the operations centre at Addenbrooke’s Hospital received a report that an unconfirmed substance had been leaked in the laboratory block”, the service said in a statement.

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Six hospital staff members have been treated for respiratory issues, the statement went on to say.

According to the service, more than 20 firefighters had arrived at the scene.

Source: sputniknews