FORT WAYNE, Ind. (WANE) — The Fort Wayne Fire Department (FWFD) responded to the scene of a large fire in southeast Fort Wayne Thursday afternoon.

At one point, a large plume of dark smoke could be seen coming from a structure near the intersection of Decatur Road and Hanna Street.

A firefighter at the scene told WANE 15 a “pole barn” structure that contained vehicles and a lot of tires caught fire just before 5:00 p.m.

Authorities said the fire also spread to two houses, but nobody suffered injuries during the incident.

FWFD said a major concern are the tires involved in the fire. One firefighter said the tires could be an issue for “hours, if not days.”

Crews were also concerned with possible water pollution from runoff containing contaminated water from the burning tires.

However, the FWFD said authorities dammed nearby drain openings with absorbent material that would prevent pollutants from entering the sewer system.

The FWFD said more than 30 firefighters responded to the scene.

A cause of the fire is still unknown.

At one point, Indiana Michigan Power reported more than 1,700 power outages in the area on I&M’s outage map, but the number fell down to less than 125 outages as of 6:44 p.m. Thursday.

It is not confirmed if the outages were related to the fire.