Both Manchester football club managers have expressed their horror at the terror attack at the Manchester Arena.
On the eve of the Europa League final between Manchester United and Ajax, Jose Mourinho said the "hearts and minds" of everyone at Manchester United are with those affected.
Jose Mourinho: "We're all very sad about the tragic events last night; we can't take out of our minds & hearts the victims & their families.— Manchester United (@ManUtd) May 23, 2017
Manchester City has echoed those sentiments, with their home ground Etihad Stadium being used as a support centre for those involved.
It's with great sadness we hear of the terrible events at the Arena. Our hearts go out to all affected and to our city's emergency services.— Manchester City (@ManCity) May 23, 2017
UEFA has accepted Manchester United's formal request to cancel their media conference ahead of the final in Stockholm.
A minute's silence will be observed before the final tomorrow morning.
Manchester City manager Pep Guardiola has expressed his shock. His wife and two daughters were at the Ariana Grande concert.
Players from both clubs have expressed their sadness and condolences on social media.