JUST IN: A terror attack has rocked the United Kington this evening. There are a number of confirmed deaths at Manchester Arena following a large explosion at an Ariana Grande concert.

Twitter users reported thousands of concert goers fled the arena  covered in blood and crying, although it is not immediately clear what the reported “loud bangs” were.

The noises were heard towards the end of the show, with witnesses claiming on social media they believed the bangs were a “gun shot” or a “bomb”.

A concert-goer named Josh told the BBC there was a huge panic as people tried to flee the arena, with some people suggesting a stampede might have caused injury and death as people tried to flee.

“She finished her last song .. and we heard like a really basey bang, and all I can remember is just everyone … was just running out… people were covered in blood, some people were having a fight, it was quite scary.”

Majid Khan, 22, said: “I and my sister, along with a lot of others were seeing Ariana Grande perform at Manchester Arena, and we were all exiting the venue when around 10.40-10,45pm-ish, a huge bomb-like bang went off that hugely panicked everyone and we were all trying to flee the arena.

“It was one bang and essentially everyone from the other side of the arena where the bang was heard from suddenly came running towards us as they were trying to exit Trinity Way and that was blocked so everyone was just running to any exit they could find as quickly as they could.

“Everyone was in a huge state of panic, calling each other as some had gone to the toilet whilst this had gone off, so it was just extremely disturbing for everyone there.”