Law-enforcement authorities in the U.K. say there are a "number of confirmed fatalities" after an explosion at Manchester Arena.

The Greater Manchester police are warning people to stay away from the area so first responders can deal with the situation.

It occurred after an Ariana Grande concert.

Her management has told the media that she is okay.

https://twitter.com/gmpolice/status/866786909544230912

https://twitter.com/SamWardMCR/status/866778426216247298

https://twitter.com/chrisslaterMEN/status/866795230221275137?ref_src=twsrc%5Etfw&ref_url=https%3A%2F%2Fwww.theguardian.com%2Fuk-news%2Flive%2F2017%2Fmay%2F22%2Fmanchester-arena-ariana-grande-concert-explosion-england

https://twitter.com/girlhoodposts/status/866803716053250048

https://twitter.com/TravelGoC/status/866802803938820097

More details will be provided as they become available.

Update: Greater Manchester police say there are 19 confirmed deaths and approximately 50 injuries. It's been treated as an act of terrorism unless the police determine otherwise.