CHARLES TOWN, W.Va. -- Fire investigators have raised the number of horses killed in a fire in Charles Town to 29.

Investigators initially said 27 horses died in Monday's fire. Independent Volunteer Fire Co. Chief Ed Smith told The Herald-Mail of Hagerstown, Md., on Tuesday that the number has since increased to 29.

The newspaper also reported that a criminal act hasn't been ruled out as a possible cause.

Assistant State Fire Marshal Patrick Barker said some evidence taken from the scene might indicate a criminal act. But Barker says investigators still need to talk to "a mound of people."

The fire destroyed four stables next to Hollywood Casino at Charles Town Races.

Twenty-six horses were rescued.