Eyewitness to man arrested after Manchester attack

The transcript describes a witness's account of a police incident involving a suspect. Initially, the scene appeared tense with police presence and a crowd reacting. The police arrested a suspect described as a black Asian male, who seemed calm and was smiling. The incident was possibly linked to the Manchester Arena attacks, though the witness perceived it as a minor event.

What connection did the police mention regarding the incident?

How did the individual react when approached by the police?