Photo courtesy of Ed WegrynFirefighters work to control a fire at a building on Waymarket Drive in Ann Arbor Tuesday.

RELATED: Fire damages Ann Arbor apartment building

Ann Arbor fire officials say they've determined the cause of a blaze that damaged an apartment building Tuesday was a cigarette left unattended on a deck.

The fire department said this morning that damages were estimated at $250,000. The blaze displaced four families in the building at 573 Waymarket Drive in Briar Cove Apartments on the city's south side, officials said.

No residents were injured, but two firefighters were treated by paramedics, officials said. One sustained a leg injury and the other had heat exhaustion.

Battalion Chief Robert Vogel said the fire was reported at around 3 p.m. as a cigarette ashtray that had caught fire. The fire spread from the deck to the building. Six units sustained smoke or water damage, Vogel said.

A total of 40 firefighters from Ann Arbor, Ypsilanti and Pittsfield Township were at the scene.