Co. Mom and Son, 6, Were Reported Missing — The Next Day, Their Bodies Were Found in a Utah National Park By Nicole Acosta

Authorities in Utah are investigating a suspected murder-suicide after a Colorado mother and her 6-year-old son were found dead in Canyonlands National Park.

Park rangers were called to the Shafer Trail around 8:15 a.m. on Thursday, Jan. 8, after receiving a tip about a suspicious vehicle, the San Juan County Sheriff’s Office in Utah said in a press release.

There, they found a woman dead outside the vehicle and a boy unresponsive inside. First responders attempted life-saving measures, and the boy was transported to the hospital where he was pronounced dead, per the sheriff’s office.

The deceased woman was later identified as the boy’s mother, according to an updated press release.

Want to keep up with the latest crime coverage? Sign up for PEOPLE’s free True Crime newsletter for breaking crime news, ongoing trial coverage and details of intriguing unsolved cases.

The sheriff’s office said the mother and son were reported missing by family out of Colorado on Wednesday, Jan. 7, though their names have not been made public at this time.

Authorities said, “based on all evidence so far, this case is being investigated as a homicide and suicide,” per the release. The investigation remains ongoing as of Monday, Jan. 12.