The cause of a Wednesday night fire at a Tiffin apartment building remained undetermined Thursday.
Chief Bill Ennis of Tiffin Fire and Rescue said the fire, which was reported at 9:54 p.m., started in a bathroom ceiling around a light and fan fixture in apartment 300, a vacant apartment, but its cause is unknown.
"The exact cause, we can't determine that," Ennis said.
That apartment received extensive fire damage and three other apartments had water damage due to the sprinkler system activation, he said.
Ennis said 26 residents were displaced by the fire, and the Red Cross has put up those without a place to stay at the Quality Inn. He said today was the earliest he expected residents to be able to return to their apartments. Their return, Ennis said, depends on the sprinkler and fire alarm system being repaired and a final inspection.
"There's a couple of other things they have to do to make sure the building is safe to enter," he said. "Right now, they're working on that."
Ennis said neighboring businesses were not affected by the fire, which was under control by 11:11 p.m. Firefighters were able to leave the scene at 1:10 a.m. Thursday, he said.
Ennis said Thursday afternoon a monetary damage amount was not available.