Police escort an injured woman outside Manchester Arena after the explosion. Goodman/LNP/Rex/Shutterstock
Reuters: Islamic State supporters celebrate Manchester attack
CAIRO (Reuters) - Islamic State supporters celebrated on social media on Tuesday after a blast at a concert venue in the north of England killed at least 19 people, although the militant Islamist group has not formally claimed responsibility.
British police have said they are treating the blast at the Manchester Arena at the end of a concert by U.S. singer Ariana Grande as a "terrorist incident". More than 50 people were wounded.
Twitter accounts affiliated to Islamic State have used hashtags referring to the blast to post celebratory messages, with some users encouraging similar attacks elsewhere.
Some messages described the attack as an act of revenge in response to air strikes in Iraq and Syria.
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WNU Editor: No confirmation yet on who was responsible for tonight's terror attack .... but all eye are on this group .... Around 3,500 suspected terrorists in UK - but powers to monitor used LESS than in 2015 (Express).