The explosion, which was a terrorist attack from a suicide bomber, occurred at the end of a pop concert by US singer, Ariana Grande at Manchester Arena at around 10.40pm. The incident has also left 59 people injured.
Kompany took to his Twitter handle and wrote: “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 ”
Later on, Manchester City’s official twitter account followed suit, while tributes also came in from Gary Lineker and other stars.
Manchester United also tweeted a condolence message on Tuesday morning as the rest of the world woke up to the sad news of the blast.
Quite a number of Manchester’s emergency services was sent down to the scene where a significant number of the 21,000 people who attended the concert were left with “shrapnel type injuries”.
It is now expected that Manchester United will likely wear black arm bands when they play against Ajax in the Europa League final on Wednesday night in Sweden.