The acting mayor of Tiffin has died.

The city announced that Mark Hayes died at his home early Tuesday.

Hayes was the city council president and had been filling in for Mayor Aaron Montz as he visits Japan.

“I am devastated to hear of the tragic passing of Mark Hayes,” Montz said.

“I had the pleasure of working with Mark my entire tenure on council, and he has played a significant role since I was elected as Mayor. I will sorely miss his knowledge, humor, friendship and sage advice.”

Rich Focht, President Pro Tempore, will assume the duties of Mayor until Montz returns on Sunday, Sept. 15.

Flags at City Hall will be flown at half-staff in Hayes’ honor until after his funeral.