Firefighters are at the scene of a massive fire at a South River business.

News 12 Reporter Ali Reid says crews from multiple agencies have been battling the fire along Main Street since 10 a.m.

One business owner told her that he believes the fire erupted at a mixed-used store.

Witnesses say the fire also spread to neighboring businesses and two apartments on the second floor.

It was not immediately clear if there were any injuries or if there was anybody in the building when the fire spread.

Roumany Tawadrous, who owns the jewelry store next door, says he had to act fast after hearing an explosion.

"I saw flames and I saw fire… and then it spreads so quickly,” he said. “My coworker called 911. We have tanks, gas tanks, so we ran inside to get it out... but the smoke was too much inside," he recounted.

The Red Cross says it is helping two families affected by the fire with lodging, food and other immediate needs.