TIFFIN, Ohio — A fire swept through a mobile home Sunday morning, killing a man and five children, police said.

The fire was reported shortly before 8 a.m. Sunday in the Highland Trailer Park in Tiffin, about 50 miles southeast of Toledo, city police said in a release. Police say part of the mobile home was engulfed in flames when fire crews arrived.

Fire crews pulled the man and five children from the home. All six were taken to Tiffin Mercy Hospital, where they were later pronounced dead, police said.

Police are working to identify the victims, and the state Fire Marshal is sending a team to help determine the cause. They said the victims’ identities would not be released until relatives were notified.

Police said emergency responders were on the scene within minutes after someone reported the fire. Tiffin fire officials didn’t immediately return messages left Sunday.

Harry Miller, chief of the Bascom Joint Fire District outside Tiffin, said about 30 members of his volunteer department assisted the city’s fire department. He said the fire was knocked down fairly quickly, and his crew had left the scene after an hour or two.

He said he had no information as to what caused the fire and referred questions on that to Tiffin fire officials.

Miller noted that fires involving children are among the most difficult for firefighters to handle, especially for those new to the job.

“We had some new EMTs on the scene as well, and it’s very tough on everyone when it involves kids,” Miller said. “It hits home because we all have kids.”

Miller said he didn’t know how old the children were but was told they were small.

A message left at a listing for the mobile home park was not immediately returned.