Get the free Morning Headlines email for news from our reporters across the world Sign up to our free Morning Headlines email
Police have identified the Manchester Arena attacker but it is too early in the investigation to release his name, Theresa May has said.
“The police and security services believe they know the identity of the perpetrator but at this stage of their investigations we cannot confirm his name," the Prime Minister added.
“The police and emergency services have as always acted with great courage and on behalf of the country I want to express our gratitude to them - they acted in accordance with the plans they have in place and the exercises they conduct to test those plans and they performed with the utmost professionalism."
Follow the latest updates on our live blog here
Police were urging members of the public not to speculate on the terrorist's identity as the investigation continued.
At least 22 people were killed and 59 more injured in the blast, which the foyer between Manchester Arena and Victoria station as thousands of people flooded out of an Ariana Grande concert on Monday night.
There has been no official claim of responsibility for the atrocity, but both Isis and al-Qaeda have been calling for attacks on the West and issued bomb-making guides.
Ian Hopkins, the Chief Constable of Greater Manchester Police, said investigators believe the attack was carried out by a lone suicide bomber “carrying” a homemade device.
“The priority is to establish whether he was acting alone or as part of a network,” he added.
Manchester explosion in picturesShow all 37 1 /37Manchester explosion in pictures Manchester explosion in pictures People running down stairs as they attempt to exit the Manchester Arena after a blast, where U.S. singer Ariana Grande had been performing, in Manchester
Twitter/@ZACH_BRUCE/ via REUTERS
Manchester explosion in pictures Helpers attend to people inside the Manchester Arena after a suspected suicide bomber detonated an explosive device at the end of an Ariana Grande concert, killing 22 people
PA wire
Manchester explosion in pictures Armed officers guard outside a hotel near the Manchester Arena following reports of an explosion, in Manchester, Britain
EPA
Manchester explosion in pictures Police officers are seen outside the Manchester Arena, where U.S. singer Ariana Grande had been performing, in Manchester, northern England
Reuters
Manchester explosion in pictures
Getty Images
Manchester explosion in pictures
Getty Images
Manchester explosion in pictures
Getty Images
Manchester explosion in pictures
AFP/Getty Images
Manchester explosion in pictures Police and fans close to the Manchester Arena, after reports of an explosion
Getty Images
Manchester explosion in pictures There have been reports of explosions at Manchester Arena where Ariana Grande had performed
Getty Images
Manchester explosion in pictures Police deploy at scene of explosion in Manchester, England, at a concert in Manchester Arena
AFP/Getty Images
Manchester explosion in pictures Police stand by a cordoned off street close to the Manchester Arena
Getty Images
Manchester explosion in pictures Police deploy at scene of explosion in Manchester, England
AFP/Getty Images
Manchester explosion in pictures Police deploy at scene of a reported explosion during a concert in Manchester, England, on May 23, 2017. British police said early May 23 there were "a number of confirmed fatalities" after reports of at least one explosion during a pop concert by US singer Ariana Grande. Ambulances were seen rushing to the Manchester Arena venue and police added in a statement that people should avoid the area
AFP/Getty Images
Manchester explosion in pictures An ambulance drives away from the Manchester Arena, where U.S. singer Ariana Grande had been performing, in Manchester
Reuters
Manchester explosion in pictures Police escort members of the public from the Manchester Arena in Manchester, England.
Getty Images
Manchester explosion in pictures A woman sits in the street in a blanket near the Manchester Arena as police guard the area following reports of an explosion, in Manchester, Britain
EPA
Manchester explosion in pictures Two women wrapped in thermal blankets stand near the Manchester Arena, where US singer Ariana Grande had been performing, in Manchester
Reuters
Manchester explosion in pictures A Royal Logistic Corps (RLC) bomb disposal robot is unloaded outside the Manchester Arena following reports of an explosion, in Manchester. At least 19 people have been confirmed dead and others 50 were injured, authorities said. It is being treated as a terrorist incident until police know otherwise
EPA
Manchester explosion in pictures A Royal Logistic Corps (RLC) bomb disposal robot is unloaded outside the Manchester Arena following reports of an explosion, in Manchester
EPA
Manchester explosion in pictures Members of the public receive treatment from emergency service staff at Victoria Railway Station close to the Manchester Arena on May 23, 2017 in Manchester, England. There have been reports of explosions at Manchester Arena where Ariana Grande had performed this evening. Greater Manchester Police have have confirmed there are fatalities and warned people to stay away from the area
Getty Images
Manchester explosion in pictures Armed police after a suspected terrorist attack at the Manchester Arena at the end of a concert by US star Ariana Grande left 19 dead
PA wire
Manchester explosion in pictures Emergency services arrive close to the Manchester Arena in Manchester
Getty Images
Manchester explosion in pictures An amoured police vehicle patrols near Manchester Arena in Manchester
Getty Images
Manchester explosion in pictures A man carries a young girl on his shoulders near Victoria station in Manchester
AFP/Getty Images
Manchester explosion in pictures Police officers stand at the Miller Street and Corporation Street Crossroads, in front of the Manchester Arena in Manchester, England
Getty Images
Manchester explosion in pictures Police block a road near to the Manchester Arena in central Manchester, England
AP
Manchester explosion in pictures Armed police patrol near Victoria station in Manchester, northwest England. Twenty two people have been killed and dozens injured after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester
Getty Images
Manchester explosion in pictures Police forensic officers leave the Manchester Arena as they investigate the scene of an explosion in Manchester
Getty Images
Manchester explosion in pictures A forensic officer collects evidence on a walkway between Victoria station and Manchester Arena following a deadly terror attack in Manchester,
Getty Images
Manchester explosion in pictures A woman and a young girl wearing a t-shirt of US singer Ariana Grande talks to police near Manchester Arena following a deadly terror attack in Manchester,
Getty
Manchester explosion in pictures
EPA
Manchester explosion in pictures Mayor of Greater Manchester Andy Burnham and Manchester City Council Leader Sir Richard Leese speak to the media outside Manchester Town Hall after a suicide bomber killed 22 people, including children, as an explosion tore through fans leaving a pop concert in Manchester
Dave Higgens/PA Wire
Manchester explosion in pictures The media gather behind a police cordon in Manchester
Getty Images
Manchester explosion in pictures Flowers left close to the Manchester Arena, the morning after a suicide bomber killed 22 people, including children, as an explosion tore through fans leaving a pop concert in Manchester
Danny Lawson/PA Wire
Manchester explosion in pictures Ariana Grande concert attendees Karen Moore and her daughter Molly Steed, aged 14, from Derby, leave the Park Inn where they were given refuge after last night's explosion at Manchester Arena
Getty
Manchester explosion in pictures Signs saying 'We love Manchester' are displayed in a window in Manchester, England
Getty Images
“The attacker, I can confirm, died at the arena. We believe the attacker was carrying an improvised explosive device which he detonated causing this atrocity.”
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies