Police are investigating whether two drug store robberies, one on Monday morning and one on Sunday afternoon, may be linked.

The most recent robbery occurred just before 6 a.m. on Monday at the Shoppers Drug Mart on Hespeler Road in Cambridge.

A masked man entered the store claiming to have a weapon and demanded drugs before fleeing on foot. No weapon was seen and no one was injured.

Waterloo Regional Police spokesperson Olaf Heinzel says "He demanded and received prescription drugs and then fled. The male is currently at large and we're still looking for him."

The suspect is described as a white male, around 6'2" tall with a thin build and wearing glasses, a light blue jacket and black dress shoes.

There was a similar robbery around 2 p.m. on Sunday afternoon when a lone man held up the Sinclair Pharmacy on Wellington Street in Stratford, also demanding prescription drugs.

Again the man fled with an unknown quantity of drugs and no one was injured.

The suspect in Sunday's hold-up is described as a male, approximately 6' tall, in his late 20s or early 30s, unshaven with short brown hair.

Stratford Police Insp. Sam Theocharis says "Right now, we're both dealing with individual offences and if they are linked down the road that will be determined through our investigation."

Despite the fact that the two incidents have not been directly linked, the motive in both cases was the same, prescription drugs.

However, it remains unclear whether police are searching for one suspect or two.