OKLAHOMA CITY - Firefighters are batting a 4 alarm commercial fire in Southwest Oklahoma City, Sunday afternoon. 

Officials told News 9 the fire began around 3:00 p.m. near Exchange Avenue and South Pennsylvania Avenue. 

There is one person being treated for possible smoke inhalation. There are no other reports of injury at this time, according to authorities. 

Vehicles have been reported to be inside the building, officials said. 

This is a developing story. Stay with News 9 and News9.com for updates as information becomes available.