A mother and father were killed this weekend at an Arkansas state park while they were out hiking with their young daughters, state police said. A manhunt is underway for the suspect.

Police are searching for an unknown suspect in the killings of Clinton David Brink, 43, and Cristen Amanda Brink, 41, according to a release from Arkansas State Police Sunday.

State police identified the victims on Sunday as 43-year-old Clinton David Brink and his 41-year-old wife, Cristen Amanda Brink. In a statement issued on Sunday, the Arkansas State Police said the couple was killed while out hiking with their two daughter, ages 7 and 9, who were not injured in the incident.