Authorities are conducting a search for two hikers in Joshua Tree National Park.

Rescue teams have been searching by air and ground for 20-year-old Rachel Nguyen and 21-year-old Joseph Orbeso. The duo were supposed to check into an Airbnb rental on Friday. When they did not, their host reported them missing to authorities, according to the Hi-Desert Star.

The couple’s car was discovered Friday afternoon about 1.5 miles from the Joshua Tree entrance in the Maze Loop area.

https://www.facebook.com/JoshuaTreeNPS/posts/10159118797130181

Orbeso’s cellphone pinged from somehwere inside the park on Friday, reports the Press Enterprise.

Anyone with info should call 909-383-5652.