Authorities now say two miniature horses have died in a fire that consumed a southwestern Ohio raceway barn last weekend, bringing to 45 the number of horses killed along with two men.

The blaze early Dec. 5 at Lebanon Raceway is still under investigation. Authorities have ruled out arson, but they said Tuesday it could be weeks before they complete their investigation into the cause.

The state fire marshal's office is working with the Lebanon fire and police departments and the Warren County coroner.

Officials have not released the names of the men who died. Horse owners and fellow workers at the harness racing track have said veteran groomers Ronnie Williams and James Edwards were killed.