Justin Bieber was among a cast of A-list celebrities attending Floyd Mayweather's world title fight against Saul Alvarez in Las Vegas, and the pop star joined the American boxing champion after his win.
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In her message Theresa May praised the "inspirational bravery" and "unbreakable spirit" of Mancunians in the wake of the blast.
ITV News has obtained exclusive footage of the moment armed police raided a house believed to be linked to the Manchester suicide bomber.
The Manchester Evening News set up a JustGiving page asking people to support the families of those affected by the suicide bombing.