SALT LAKE CITY, Utah – Authorities on Thursday released a statement asking for the public’s help in the case of the missing Vallow children, Tylee Ryan, 17, and Joshua “JJ” Vallow, 7.

According to the statement, the FBI and the Rexburg Police Department are requesting photos and videos from anyone who may have visited Yellowstone National Park on Sept. 8, 2019.

“An ongoing investigation has determined that the children were in Yellowstone National Park on that date with their mother, Lori Vallow, and uncle, Alex Cox.” the statement reads.

The group was traveling in a silver 2017 Ford F-150 pickup, with Arizona license plate CPQUINT according to the FBI.

“Law enforcement is seeking photos and videos which may have captured images of these persons and the vehicle, or images of crowds and other park visitors where these individuals may be present,” according to the statement.

Pictures and videos can be submitted at FBI.gov/Rexburg. Tips can also be reported by calling the Rexburg Police Department at 208-359-3000, or the National Center for Missing and Exploited Children at 1-800-843-5678.