New details have emerged from an investigation into a stabbing at a Winnipeg business.

The major crimes unit of the Winnipeg Police Service (WPS) says it is believed a 13-year-old boy was responsible for the assault.

The child entered the convenience store on Isabel Street without a face mask. When asked to wear one by an employee, the boy became angry. He bought several food items and then stabbed the 41-year-old male employee.

Offiers responded to the stabbing at around 3:50 a.m. Friday.

Police have determined the incident was unprovoked. The child was taken into custody after he was located at a residence in the West Alexander area.

The child has been charged with aggravated assault and assault with a weapon.

He has been detained in custody.