There has been an explosion in the basement of the Birmingham Repertory Theatre on Broad Street at around 8:15pm this evening (13 February).
Residents in the Jewellery Quarter also heard the noise, which was described by one witness as "shocking".
The theatre tweeted to confirm that it was down to a technical fault and no one was hurt.
Theatre-goers and staff were evacuated and looked after at another venue.
Witnesses told ITV News Central that the bang was very loud.
Security personnel are at Birmingham Library warning individuals to stay away.
People have been tweeting about the explosion: