Several dead after explosion reported at Ariana Grande concert

Several people have died and more are injured after an explosion rocked Manchester Arena in the UK at the end of an Ariana Grande concert Monday night.

Videos on Twitter showed concertgoers running from the stands and screaming as police warned people to avoid the area.

Local police said they were treating the incident as terrorism.

This Tweet is currently unavailable. It might be loading or has been removed.

This Tweet is currently unavailable. It might be loading or has been removed.

This Tweet is currently unavailable. It might be loading or has been removed.

Emergency personnel were on the scene outside.

This Tweet is currently unavailable. It might be loading or has been removed.

Greater Manchester Police warned people to stay away from the area just before 11 p.m. local time and armed police were pictured on nearby streets shortly afterwards.

This Tweet is currently unavailable. It might be loading or has been removed.

This Tweet is currently unavailable. It might be loading or has been removed.

A bomb disposal unit drove into the venue just after midnight local time.

This Tweet is currently unavailable. It might be loading or has been removed.

This Tweet is currently unavailable. It might be loading or has been removed.

British Transport Police said officers were responding to reports of an explosion in the foyer part of the venue. A subsequent statement from the Arena said that the incident took place outside the venue in a public space.

One attendee reported on Twitter that the show had ended when the incident occurred.

This Tweet is currently unavailable. It might be loading or has been removed.

That was confirmed by another witness, speaking to a local reporter for the Guardian, who said that they heard a loud bang at the end of the concert after the main lights had come on. Grande had just disappeared behind a curtain when the incident happened, according to another witness.

In an emailed statement, Joseph Carozza, a representative for Grande from Republic Records, said she was unharmed: "Ariana is O.K. We are further investigating what happened."

Another concertgoer, Josh Elliott, told the BBC that "a bang went off and everyone stopped and screamed ... we basically hit the deck."

"We got up when we thought it was safe and got out as quickly as possible," he added. "People were just crying and in tears ... police cars were everywhere. We just wanted to get out as quickly as possible because we didn't know what was going on."

Grande was playing the venue as part of her Dangerous Woman tour.