Of course it was a terrorist attack - Manchester

From CBS News:

Manchester bomber identified: Latest in terror investigation
Police on Tuesday identified the man who blew himself up the previous night at an Ariana Grande concert in Manchester, England, as 22-year-old Salman Abedi. CBS News confirmed Abedi was known to British authorities prior to the attack.

In a generic statement posted online, the Islamic State of Iraq and Syria (ISIS) claimed responsibility for Abedi's suicide bomb attack, which left 22 people dead, including children, at one of the entrances to the Manchester Arena.

Treacherous scum - they need to be wiped off the face of this Earth.