Fire officials say there was a gas leak at a shopping center on the 400 block of South Riverside Avenue on Monday afternoon.

Firefighters from the Croton-on-Hudson Fire Department uncovered the leak at the shopping center after a carbon monoxide detector went off.

Officials at the scene created a diagram of the center as they were met with low levels of carbon monoxide and one person feeling nauseous.

They checked half a dozen businesses and noticed an odor of gas.

Crews accessed the roof with Con Edison and found a gas leak at a rooftop heating unit.

The unit was turned off, and fans were used to vent the affected store front.

No injuries were reported.