A Kenai family’s abrupt disappearance remains a mystery.

Canine search teams from out-of-state spent days scouring areas thought to hold clues to what may have become of 37-year-old Brandon Jividen, 22-year-old Rebecca Adams, 5-year-old Michelle Hundley and 3-year-old Jaracca Hundley.

Investigators from Kenai Police Department and Federal Bureau of Investigation also conducted a ground search, and a helicopter peered down looking for clues.

“Both of these expansive efforts did not reveal the location of the missing persons,” KPD wrote in a release.

Family members last heard from Adams on May 27 when she made a phone call to her sister, Lanell Adams, in which the missing mother sounded “distressed.”

There was no sign of forced entry into the apartment and officers found the door to the apartment locked. Investigators did not observe any signs of a struggle or obvious signs foul play in the apartment.

Both Adams and Jividen’s vehicles remain parked behind their home, but police could not confirm how long it had been since they had last been moved.

While police are unsure what happened, they say Jividen enjoyed the outdoors., though there is no specific information that the family is in a remote wilderness areas.

“We are hopeful members of the public will closely observe the missing person photographs and immediately report any sightings of the missing persons in urban areas, as well as remote areas of Alaska,” KPD wrote.

Anyone with information about the missing family is asked to call the Kenai police at 907-283-7879.