Police have arrested a third suspect in a robbery at an Oakville pharmacy.
Anthony Cosic, 18, of Hamilton is charged with numerous offences, including robbery with a firearm, forcible confinement and assault with a weapon.
A man and woman, also from Hamilton, were arrested May 30 and face similar charges.
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Police say the Guardian Pharmacy at 1235 Trafalgar Rd. was robbed by two men with handguns on May 29.
Investigators say several customers were sprayed with a noxious substance before the suspects fled the store with an undetermined amount of cash and prescription medication.
Police say the two suspects fled to a waiting car.
Several witnesses were treated by paramedics at the scene and some were taken to hospital for further treatment.