Greater Manchester Police are responding to what they're describing as a 'serious incident' at a gig at the Manchester Arena.
It's being reported on social media that a 'loud bang' was heard at the end of a performance by Ariana Grande, which caused concert-goers to rush out of the venue
It's not clear at this stage what has caused the bang.
In a tweet, GM Police confirmed they were responding, and have advised people to stay away from the area:
Emergency services responding to serious incident at Manchester Arena. Avoid the area. More details will follow as soon as available— G M Police (@gmpolice)