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Authorities search for University of Iowa student Mollie Tibbetts who was reported missing after going on an evening jog.

Mollie Tibbetts was dog-sittingin at her boyfriend's home, Wednesday night, that's the last time she was seen.

Tibbetts and her boyfriend, 20-year-old Dalton Jack, were planning a trip to the Dominican Republic next month. Afternoon: A coworker of Tibbetts' called Jack to tell him she hadn't shown up for work and also hadn't called in sick. Dalton explained that Mollie always wears her fitness tracker (FitBit) and usually brings her cellphone when she goes for a run.

"This is not like her at all", Mollie's aunt Kim Calderwood told WOI.

"She's an incredibly responsible, intelligent person".

The Division of Criminal Investigation and the Federal Bureau of Investigation is now getting involved with the search for Mollie Tibbetts. "There is no such thing as a silly tip or lead". She's reportedly never had issues with anything or anyone that would spark her disappearance.

Crews also tried searching with helicopters, but low cloud cover prevented them from getting the aircraft up, a spokesperson for the Poweshiek County Sheriff's Office said. He said when he opened it, he expected to talk to her again soon.

According to the sheriff's office, the last reported sighting of Tibbetts was Wednesday evening. The University of Iowa, where Tibbetts is due to be a sophomore, releases a statement that they are monitoring the situation and offering support where needed.

"She's the kind of person who is there for anybody anytime and would be the first person to help anyone", she said.

Investigators are working with the university to access a laptop and online accounts belonging to Tibbetts that may have an electronic footprint of her whereabouts, said her cousin Emily Heaston.

'(There are) no words to describe how you feel when you don't know where or how your child is, ' Calderwood told ABC News. "Mollie is 5'2" and weighs 120 pounds, with long brown hair and brown eyes.

Poweshiek county sheriff Thomas Kriegel said: "Everything's on the table, unfortunately". Her family and friends continue to search for clues and answers, and plead for anyone with any information to come forward. Her loved one realized she was missing when she didn't go into work the next day or call in sick. A neighbor who last saw her while jogging said she was wearing gym shorts, a black sports bra, and running shoes.