The emergency sirens at Imperial Oil were activated at 6:44am this morning due to a small fire at a chemicals unit.
A CVECO Code 8 was issued.
The Sarnia Fire Rescue Service was dispatched to the scene. By the time they arrived an Imperial worker had already extinguished the fire at 6:58am and the "all clear" was issued.
All employees were accounted for and there were no injuries.
While a cashier was scanning items, the man reportedly took out a firearm and demanded that they put the items into a brown paper bag.
Police are appealing for witnesses or dashcam footage
Lambton County OPP say the investigation is continuing
Point Edward virtuoso harmonica player Mike Stevens is among 83 people appointed to the prestigious Order of Canada.
Canada Day festivities are planned for Tuesday in Petrolia, Forest, Port Franks and Grand Bend.
Shortly after 6 p.m. Sunday, Sarnia police responded to reports of a man walking into traffic on Christina Street near Wellington Street, and threatening random people on the sidewalk.
