Police are looking at the dating apps of a missing University of Utah sorority sister who disappeared last week shortly after taking a Lyft ride.

Salt Lake City Police confirmed Tuesday that 23-year-old Mackenzie Lueck’s dating life has become part of the investigation after receiving tips that she was interested in older men and casually seeing several people.

“In regards to her online activity, we are aware of this aspect and continue to look into all facets of her life for leads into her disappearance,” Assistant Police Chief Tim Doubt said at a press conference.

Lueck, who is from El Segundo, Calif., went missing within hours of arriving at Salt Lake City airport on June 17 from a trip home for her grandmother’s funeral.

The college senior called a Lyft from the airport to Hatch Park in North Salt Lake, where the ride-share driver saw her jump into another vehicle just before 3 a.m. with an unknown individual, authorities said.

Police said they were unable to verify the make of the vehicle or the identity of the person she encountered at the park.

“The description we have is vague. It could’ve been a male or female,” Doubt said. “We have exhausted all avenues of determining this information and are asking that person please call us.”

Lueck’s roommates became concerned when she never showed to their Trolley Square apartment near campus, police said. She also missed a school exam, as well as a flight scheduled Sunday to Los Angeles.

“We see no indication that she has gone off the grid before,” Doubt said. “This behavior is uncharacteristic.”

Doubt said there’s no indication that foul play is involved in her disappearance but authorities have concerns because of the “lack of this being her character.”

“Mackenzie, in the case, if you just want to be left alone please just let us know that you’re safe,” Doubt said at the press conference.

Authorities urged the public to contact them about “lingering questions,” such as whether she has an alternate phone or secret social media accounts.