A mother intentionally set herself and her two children on fire in a storage room at a Winter Haven motel last week, investigators said Wednesday. All three died in the blaze.

It is not known what led the 25-year-old woman to kill herself, her three-year-old daughter and her 1 year-old son. Autopsy results are pending.

Click here for a video report from MyFoxTampaBay.com.

Fire investigators said they found a melted cigarette lighter and a plastic gasoline container inside the room at the Camellia Motel.

The family lived at the motel, which the woman's husband co-owned.