Five people have been injured in a series of stabbings at Manchester's Arndale shopping centre.
Greater Manchester Police said counter-terrorism detectives were investigating the attacks at the city centre complex on Friday morning. A man in his 40s has been arrested on suspicion of serious assault.
Paramedics have treated four people, a spokeswoman for North West Ambulance Service (NWAS) told The Independent. No details on the victims' conditions were immediately available.
Footage posted on Twitter showed a police pointing a Taser at a man lying face down on the pavement outside the shopping centre as another officer handcuffed him.
The Arndale centre has been evacuated.
Source: National News Agency