<sod >E to leave it they did not have serious injuries to make way for casualties from the blast Manchester City FC also tweeted a tribute: '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.' Pictured: People outside the concert venue text on their phones A man wearing a white towel walks next to a police officer.< eod>< sod > Here, a group of women walk over a plastic barrier held down by a police officer  Manchester City FC also tweeted a tribute: '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.' Pictured: People outside the concert venue text on their phones Metropolitan Police Commissioner Cressida Dick this morning announced that extra police officers have been put on duty in London in the wake of the 'utterly appalling' attack in Manchester.< eod>