Iowa authorities were mum Friday on details of their investigation into missing college student Mollie Tibbetts — but said they have a “solid timeline” of her disappearance.

Kevin Winker, director of investigative operations at the Iowa Department of Public Safety, refused to say whether they’ve identified any suspects in the ongoing case.

“We’re not in the position to say who is a suspect, who isn’t a suspect or if there are any suspects,” Winker told reporters at a press conference in Montezuma.

But he said, “I’m confident we have a solid timeline that we’re working on” — though he added that they weren’t releasing that information yet.

Winker said tips have been flowing in since Tibbetts was last seen July 18 going for a run in Brooklyn, Iowa.

“The investigative response has not slowed down,” he said. “Unfortunately, we have not yet found Mollie, but it’s not because of lack of effort or lack of resources.”

As many as 40 investigators a day have been working on prioritizing — and then checking out — the leads that have poured in.

“We’ve conducted numerous interviews at this point,” Winker said, though he declined to give specifics.

Meanwhile, Tibbetts’ distraught father, Rob, thanked the media for keeping his daughter’s case at the top of the news.

“I can’t tell you how much we appreciate you,” he said. “We’re all in this together.”

Police say Tibbetts was last seen wearing dark running shorts and running shoes. Initially, they said she was wearing a black sports top — but now say the top was pink.