SOUTH DENNIS — An investigation is underway following a smoky fire at 290 Great Western Road on Wednesday morning.

The Dennis Fire Department responded to the scene shortly after 4 a.m., after heavy smoke was reported coming from the two-story commercial building that houses five businesses.

The source of the fire was located near an elevated water heater in the offices of Michael Speakman & Associates, a building and remodeling company, according to a statement from the Dennis Fire Department.

The business suffered moderate fire, smoke and water damage.

The Harwich and Brewster Fire Departments provided mutual aid at the scene.

There were no injuries reported.