UK police have confirmed a deadly blast at a stadium in the city of Manchester is being treated as a terrorism incident, Reuters reported on Tuesday, adding the death toll was at least 19 people with more than 50 injured.

Earlier, a BBC reporter said the incident was being viewed as a terrorism incident, with an investigation underway as emergency service crew scrambled at the site of the blast.

“Senior national counter-terrorism officers are assembling in London. Early estimates put fatalities at Manchester Arena in double figures,” a BBC reporter said on Twitter.