An Ohio fire chief says investigators are certain smoking cigarettes or burning candles ignited a mobile home blaze that killed five children and their mother's boyfriend.
A report released Friday lists the cause as undetermined. But the fire chief in the northwest Ohio city of Tiffin says evidence of burning candles and smoking were found where the fire started. He says investigators are sure one of them is to blame.
The chief says there's nothing to indicate anything criminal took place.
The children were ages 1 to 6. They and the man died Sunday morning. The children's mother was at work when the fire broke out.
Investigators say there were working smoke detectors inside the trailer but the victims got trapped.