In pictures: People pay tribute to victims of Manchester attacks

At least 22 people were killed in the explosion at Manchester Arena on Monday night
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A man stands in front of a fountain illuminated with the colours of the United Kingdom flag on May 23, 2017, in Zagreb, during a tribute to victims of an attacks claimed by Islamic State which killed at least 22 people and left more than 60 injured in Manchester the day before. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. British police on May 23 named the suspected attacker behind the Manchester concert bombing as Salman Abedi, but declined to give any further details. (STRINGER/AFP/Getty Images)
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Posters in solidarity with the dead and injured from the terror attack in Manchester are arranged on the pavement in Trafalgar Square in central London on May 23, 2017. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. British police on Tuesday named the suspected attacker behind the Manchester concert bombing as Salman Abedi, but declined to give any further details. (DANIEL LEAL-OLIVAS/AFP/Getty Images)
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TOPSHOT - People attend a vigil in Albert Square in Manchester, northwest England on May 23, 2017, in solidarity with those killed an injured in the May 22 terror attack at the Ariana Grande concert at the Manchester Arena. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. British police on Tuesday named the suspected attacker behind the Manchester concert bombing as Salman Abedi, but declined to give any further details. (BEN STANSALL/AFP/Getty Images)
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TOPSHOT - People pray and light candles set up in front of floral tributes in Albert Square in Manchester, northwest England on May 23, 2017, in solidarity with those killed and injured in the May 22 terror attack at the Ariana Grande concert at the Manchester Arena. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. British police on Tuesday named the suspected attacker behind the Manchester concert bombing as Salman Abedi, but declined to give any further details. (BEN STANSALL/AFP/Getty Images)
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TOPSHOT - Manchester United's English striker Wayne Rooney (centre L) and Manchester United's Belgian midfielder Marouane Fellaini (centre R) stand with teammates as they observe a minute's silence for the victims of yesterday's terror attack at the Ariana Grande concert at the Manchester Arena last night, during a team training session at the club's training complex near Carrington, west of Manchester in north west England on May 23, 2017, ahead of their UEFA Europa League final football match against Ajax. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. (PAUL ELLIS/AFP/Getty Images)
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A man carries a young girl on his shoulders near Victoria station in Manchester, northwest England on May 23, 2017. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. (OLI SCARFF/AFP/Getty Images)
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A taxi advertises its services for free in Albert Square in Manchester, northwest England on May 23, 2017, in solidarity with those killed and injured in the May 22 terror attack at the Ariana Grande concert at the Manchester Arena. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. British police on Tuesday named the suspected attacker behind the Manchester concert bombing as Salman Abedi, but declined to give any further details. (BEN STANSALL/AFP/Getty Images)
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People attend a vigil in Albert Square in Manchester, northwest England on May 23, 2017, in solidarity with those killed an injured in the May 22 terror attack at the Ariana Grande concert at the Manchester Arena. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. British police on Tuesday named the suspected attacker behind the Manchester concert bombing as Salman Abedi, but declined to give any further details. (BEN STANSALL/AFP/Getty Images)
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An electronic advertising board displays a Union flag and the words 'Pray For Manchester', close to the Manchester Arena in Manchester, northwest England on May 23, 2017, following a deadly terror attack at an Ariana Grande concert at the Manchester Arena on May 22. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester.(BEN STANSALL/AFP/Getty Images)
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A sign saying 'Ariana we heart you' is displayed amongst flowers left in St Ann Square on Tuesday, May 23, 2017 in Manchester,England. At least 22 people were killed in a suicide bombing at a pop concert packed with children in the northern English city of Manchester, in the worst terror incident on British soil since the London bombings of 2005.Ê (Getty Images)
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A woman (L) with two girls, one wearing a t-shirt of US singer Ariana Grande with balloons from the Ariana Grande concert at the Manchester Arena leave a hotel in Manchester, northwest England on May 23, 2017 following a deadly terror attack at the concert at the Manchester Arena the night before. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. (OLI SCARFF/AFP/Getty Images)
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Messages and floral tributes are seen in Albert Square in Manchester, northwest England on May 23, 2017, in solidarity with those killed and injured in the May 22 terror attack at the Ariana Grande concert at the Manchester Arena. Twenty two people have been killed and dozens injured in Britain's deadliest terror attack in over a decade after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester. British police on Tuesday named the suspected attacker behind the Manchester concert bombing as Salman Abedi, but declined to give any further details. (BEN STANSALL/AFP/Getty Images)