The Royal Newfoundland Constabulary is investigating an armed robbery that took place at a gas station in the east end of St. John's early Sunday morning.

Police said a lone male entered the Esso store on Newfoundland Drive and Portugal Cove Road, wielding a knife, and left with an undisclosed amount of money.

Patrol officers were assisted by the RNC's K-9 unit.

There were no reported injuries as a result of the incident, and no arrests have been made.