GRAND CANYON NATIONAL PARK, Ariz. (AP) — Authorities are asking the public to reach out to them with any information on a Hungarian man whose vehicle was found at Grand Canyon National Park.

The family of Gabor Berczi-Tomcsanyi, 45, reported him missing to Las Vegas police. Authorities determined he recently traveled to the Grand Canyon as part of an extended trip to the U.S. Southwest, Grand Canyon spokeswoman Joelle Baird said Thursday.

The silver Honda Accord he was driving was located at a Grand Canyon visitor center on Aug. 9, with his belongings in it. Searches by ground and from the air at the park's South Rim and below the rim have turned up no sign of him so far, Baird said.

“We don't really have any additional clues that would lead us to other areas of the park where he might be,” she said.

Investigators believe Berczi-Tomcsanyi arrived at the Grand Canyon's South Rim on July 19. He did not have a backcountry permit or lodging reservations at the park, Baird said. It's not uncommon for vehicles to be parked in any of the lots for weeks at a time, she said.

Officials are urging anyone who saw him or interacted with him recently to contact investigators at the Grand Canyon. He was believed to be traveling alone.