Police have arrested an armed man who was brandishing a knife in a Blackheath supermarket.

Officers were called to Sainsbury's at around 12.10pm following reports that the offender was carrying a knife. Following a search of the area, a man was found and has been arrested.

The area was evacuated and Halesowen Street, John Street and Union Street were closed and remain shut.

A police spokesman said there have been no reported injuries. Roads around the town centre have been re-opened and the cordon reduced to the area around Sainsburys'.