A Brampton man is facing four robbery charges in connection with a string of heists at retail stores by a man armed with a syringe.

The arrest was announced Thursday (March 29) by York Regional Police after a three-month investigation into several robberies that occurred in Richmond Hill, Vaughan and Toronto.

In each of the robberies, a man entered retail stores and asked an employee for high-value items including laptop computers and high-priced winter jackets, police said.

He then “produced a syringe and threatened the employee,’ police said in a release, noting the employees were never physically-injured.