MANCHESTER, England (CBSMiami) – Greater Manchester police report 19 people have been killed and about 50 more were injured in an explosion after an Ariana Grande concert at Manchester Arena Monday night.READ MORE: 2 Doral Police Officers Injured In Shooting Near Miami-Dade Police Headquarters; Suspect Killed
Chief Constable of Greater Manchester Police Ian Hopkins held a late press conference and said that they are currently treating the explosion at Manchester Arena as a “terrorist incident” until they have further information.
“This is a very concerning time for everyone,” Hopkins said. He also said that further details would be released when they have a clearer picture.
Two U.S. law enforcement told CBS News the blast was carried out by a suicide bomber.
The sources said the bomber traveled by Tube to Victoria Station, went to the arena’s ticket area and detonated the explosive device as people were leaving the concert.
Sources said ball bearings have been recovered, and officials are tracing the movements of the attacker through closed-circuit television.
Parts of the suicide bomber have been recovered, a source said.
One of the sources said that one person was detained in a vehicle, but it is not clear what if any involvement that potential suspect may have had in the attack.
Many of the victims were young girls, the source told CBS News.
Joseph Carozza, a representative from Grande’s U.S. record label, said the singer is OK and they are investigating what happened.
Grande took to Twitter late Monday night to share her condolences.
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Police cars and riot vans were seen outside the arena.
“A huge bomb-like bang went off that hugely panicked everyone and we were all trying to flee the arena,” concertgoer Majid Khan, 22, told Britain’s Press Association. “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.”
Police advised the public to avoid the area around the Manchester Arena, and the train station near the arena, Victoria Station, was evacuated and all trains canceled.READ MORE: Miami Weather: Rain Returns To South Florida
“Due to an incident involving the emergency services [Manchester Victoria] has been evacuated,” Northern train service officials said. “We will provide further updates when possible.”
Witness Jenny Brewster, told Sky News she and her daughter were on their way out of the arena when a man screamed, “Run!”
“As soon as you got to the car, you could smell the burning,” she said.
Brewster said she did not see anyone injured, and said she only heard one explosion.
Zach Bruce, who was at the concert, described the scene on the phone to CBSN.
“It was one loud bang — it was so loud,” Bruce said.
Asked if he would describe it as an explosion, he said yes — “It was an explosion.”
He described people panicking.
“I didn’t know what was going on,” he said.
One Twitter user said she heard “explosions” from inside the area, Grande performed moments earlier. The reports of both gunshots are unconfirmed.
One concert goer told BBC 5 she was one of first people to exit the stadium. She said she heard an explosion toward the end of the performance.
Jeremy Corbyn, leader of the Labour Party, responded to reports of the incident on Twitter.
“Terrible incident in Manchester,” he said. “My thoughts are with all those affected and our brilliant emergency services.”
There were an estimated 20,000 people inside the arena on Monday night.
The Department of Homeland Security is closely monitoring the situation. They released a statement, which read, in part:
“At this time, we have no information to indicate a specific credible threat involving music venues in the United States. However, the public may experience increased security in and around public places and events as officials take additional precautions.”MORE NEWS: Crime Experts: Notebook Found Near Brian Laundrie's Remains May Answer Questions In Fiancée Gabby Petito's Death
Stay with CBSMiami.com for updates on this developing story.