UK controlled bomb explosion completed

British police have carried out a controlled explosion on a suspicious object that turned out to be abandoned clothing in a park near a music venue in Manchester where 19 people died in a blast which is being treated as a terrorist incident.

"There will be a controlled explosion in Cathedral gardens shortly if you hearing anything don't be concerned," Greater Manchester Police said on Twitter.

Earlier on Monday night 19 people died and 50 others were injured in an explosion at Manchester Arena at the end of a concert by US singer Ariana Grande sparking panic among concertgoers.