LIVONIA, Mich. -

A woman died early Thursday morning in a house fire in Livonia, and fire investigators say careless smoking was to blame.

Livonia Fire Marshal Dan Lee says 60-year-old Debra Holmes was found on her bedroom floor after firefighters extinguished the flames at a home in the 17000 block of Oporto Street – which is off Six Mile Road west of Middlebelt Road.

There were smoke detectors inside the home but none were working, fire investigators say.