A top university’s science department was evacuated after a student “accidentally” concocted a deadly explosive – the same as that used in the 7/7 bombings.

The explosive substance TATP, or acetone peroxide, was created in the University of Bristol’s chemistry lab, according to a staff member.

It’s the same chemical that was used in the London 7/7 bombings as well as terror attacks in Paris and Brussels.

Staff and students from the School of Chemistry were evacuated after the dangerous mixture was discovered in a lab at 2.30pm on Friday.

Police, ambulances and five fire engines attended as a precaution and a bomb disposal team attended to help dispose of the chemical.

Avon and Somerset Constabulary said it could not comment on the substance but confirmed the incident was not being treated suspicious.

Twitter user Hannah Gamlin, who is based in the West Country, tweeted: ‘If you just heard a loud bang in Bristol it was an unsafe substance from Bristol Uni chemistry lab being disposed of in Royal Fort Gardens.’

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