Charlottetown Police are investigating an armed robbery overnight Tuesday at the Needs Convenience store on Euston Street.
Deputy Chief Gary McGuigan said a woman entered the store shortly before 2 a.m. and threatened the clerk with a syringe. She then ran from the store with an undisclosed amount of money and headed down Weymouth Street.
McGuigan said the threat of syringes in robberies is becoming more common.
"The last little while, we have seen an increase in the number of people that have used syringes, so it may be because they are the most available weapon that these people have at hand," he said.
"If you even poke somebody with a syringe and it's contaminated then you run the risk of HIV, hepatitis, or some other communicable disease."
A video of the suspect in the robbery has been put up on the Charlottetown Police website. Anyone with information is asked to call the Charlottetown Police or Crime Stoppers.