— Alan Brennan (@alanbmufc92) May 22, 2017
People inside the arena screamed bloody murder, according to videos uploaded to Twitter. Police confirmed 19 people died and 50 were injured — many of whom suffered "shrapnel injuries."
Police statement on incident at Manchester Arena pic.twitter.com/gaKASukx9a— G M Police (@gmpolice) May 22, 2017
After the explosion(s), people escaped the building in frenzy from what they'd just heard — some were in tears, according to UK media.
Manchester Police issued warnings to "stay away" from the area while officials worked to stabilize the situation.
EXPLOSION AT MANCHESTER ARENA AND EVERYONE RAN OUT SO SCARY😭 pic.twitter.com/pJbUBoELtE— ♡♡ (@hannawwh) May 22, 2017
Train lines have stopped running from the Victoria station in Manchester. Everyone in the facility had to evacuate because of an apparent looming threat.
— Darryl Morris (@darrylmorris) May 22, 2017
Law enforcement "responded to reports of an incident at Manchester Arena," Greater Manchester Police tweeted.
— G M Police (@gmpolice) May 22, 2017
Roads have been shut down in Manchester city centre, according to a local reporter.
"We saw young girls with blood on them, everyone was screaming and people were running. There was lots of smoke," a concert goer told Manchester Evening News.
Pop star Ariana Grande is "okay," an official spokesman for the artist said.
"Just ran from an explosion, genuinely thought we were gonna die," an attendee exclaimed on Twitter.