Former England captain David Beckham was those to pay his respects following an explosion that left 22 dead on Monday night.
The blast, which was a terrorist attack from a suicide bomber, happened at the end of a pop concert by US singer Ariana Grande at Manchester Arena at around 10.40pm. It has also left 59 people injured.
Beckham, who played with distinction for Manchester United for a number of years, posted a heartfelt tribute on his Instagram page.
Meanwhile, Manchester City captain Vincent Kompany tweeted: “I would like to express my deepest condolences to the families of the victims. It’s a sad day for the great city of Manchester. #Unity ”
And Manchester City’s official twitter account soon followed suit, while tributes also came in from Gary Lineker and other stars from the sporting world.
Manchester United also tweeted a message of condolence on Tuesday morning as people woke up to the devastating news of the attack.
I would like to express my deepest condolences to the families of the victims. It's a sad day for the great city of Manchester. #Unity
— Vincent Kompany (@VincentKompany) May 22, 2017
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
We are deeply shocked by last night’s terrible events at the Manchester Arena. Our thoughts and prayers go out to all those affected.
— Manchester United (@ManUtd) May 23, 2017
The thoughts of everyone at the Club are with all those affected by last night's incident in Manchester.
— Tottenham Hotspur (@SpursOfficial) May 23, 2017
— Marcus Rashford (@MarcusRashford) May 23, 2017
The thoughts of everyone at Everton Football Club are with those affected by last night’s incident in Manchester. pic.twitter.com/s3axMhZaCn
— Everton (@Everton) May 23, 2017
Our thoughts and prayers are with everyone affected by last night's incident at the Manchester Arena and the people of Greater Manchester.
— Newcastle United FC (@NUFC) May 23, 2017
The thoughts of everyone at #LUFC are with all those affected by last night's tragic events in Manchester
— Leeds United (@LUFC) May 23, 2017
— Philip Neville (@fizzer18) May 23, 2017
Truly awful news from the great city of Manchester. Thoughts are with all those affected.
— Gary Lineker (@GaryLineker) May 22, 2017
? and hoping everyone is safe at Manchester Arena tonight.. ?
— Tony Bellew (@TonyBellew) May 22, 2017
Our prayers and strengh to the victims and their families involved in this tragedy in Manchester. Stay strong. @ArianaGrande ??
— Dwayne Johnson (@TheRock) May 22, 2017
The full might of Manchester’s emergency services was deployed to the scene where a significant number of the 21,000 people who attended the concert were left with “shrapnel type injuries”.
It is expected that Manchester United will consider wearing black arm bands when they face Ajax in the Europa League final on Wednesday night in Sweden.
There is also an urgent appeal to donate blood and the Manchester Evening News have published a list of where this can be done.
Full list of places you can give blood in Manchester https://t.co/gKbmVWSjFR
— Manchester News MEN (@MENnewsdesk) May 23, 2017