Islamic State supporters celebrate Manchester attack online
Baku, Azerbaijan, May 23
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, the Telegraph reported May 23.
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.