Authorities reported on Sunday that a man and woman recently relocated to the northwest region of Arkansas were found dead while hiking with their daughters in a local state park.

The Arkansas State Police identified the deceased as Clinton David Brink, aged 43, and Cristen Amanda Brink, aged 41. In a statement, the agency mentioned that the couple had recently settled in Prairie Grove, Arkansas, moving from another state.

Verified Facebook profiles, as noted by NBC News, indicate they previously resided in inland regions of California and eastern Montana, with public records identifying their location as Miles City, Montana.

State police said the agency was notified of the double homicide in Devil’s Den State Park shortly before 3 p.m. Saturday. The park is about 12 miles east of Prairie Grove and about 25 miles south of Fayetteville.

“We are heartbroken by today’s horrific news from Devil’s Den State Park and are in close contact with State Police and the Department of Parks, Heritage and Tourism as they work to apprehend the suspect,” Gov. Sarah Huckabee Sanders said on X on Saturday evening.

She said “law enforcement will not rest” until the killer is found and prosecuted.

The victims’ daughters, ages 7 and 9, were not harmed and were in the custody of family, the agency said Sunday. It’s not clear whether they witnessed the homicides.

A manhunt led by Arkansas State Police is underway. An FBI representative did not immediately respond to a request for comment.

State police said the killer is a man with a medium build who was wearing a dark, long-sleeved shirt with the sleeves rolled up, dark pants, a dark baseball cap, and fingerless gloves.

He may have been seen driving toward a park exit in a black sedan, possibly a Mazda, with tape obscuring its license plate number, state police said. Investigators believe the man may have driven on State Highway 170 or State Highway 220 nearby.

There was no information available on the type of weapon used or a motive.

The Arkansas State Crime Lab will confirm the manner and cause of death, state police said.

Detectives hope cellphone and security video can help them crack the case. They called for anyone at the park Saturday with cellphone or GoPro-style imagery to step forward.

The area of the park where the homicides took place was off-limits Sunday as the investigation continues, state police said. The couple’s bodies were found on a walking trail, the agency said.

It described the area as “remote and rural,” a region “where the terrain is rugged, vegetation is thick and there is no cellphone service.”

A state parks spokesperson said all trails at Devil’s Den were off-limits until further notice.

Last month, a dedication was staged for a newly renovated campground at the park. Arkansas State Parks describes Devil’s Den as “a favorite destination for hikers, mountain bikers and equestrians.”

It’s not clear how the double homicide was initially reported.