The FBI and partner agencies are conducting ground surveys at the Spread Creek Dispersed Camping Area in the Bridger-Teton National Forest in connection with the search for Gabrielle “Gabby” Petito, the agency said Saturday. (FBI Denver, Twitter)

CASPER, Wyo. — The FBI and partner agencies are conducting ground surveys at the Spread Creek Dispersed Camping Area in the Bridger-Teton National Forest in connection with the search for Gabrielle “Gabby” Petito, the agency said Saturday.

The FBI seeks assistance from anyone who utilized the Spread Creek Dispersed Camping Area between the dates of August 27-30 who may have had contact with Gabby or her boyfriend Brian Laundrie, or who may have seen their vehicle.

The FBI and partner agencies are conducting ground surveys at the Spread Creek Dispersed Camping Area in the Bridger-Teton National Forest (Grand Teton National park, Facebook)

Gabby and her boyfriend were traveling in a white 2012 Ford Transit van with a variety of stickers on the back and Florida plate QFTG03. The FBI has a Missing Person poster that includes photos of Gabby and her van available for review or download on the FBI website.

Gabrielle Petito was reported missing on Saturday, September 11. (Suffolk County Police Department, Facebook)

“If you were in the area and saw Gabby and/or her boyfriend or their vehicle, please provide that information to the FBI through these tiplines”:

Photos and videos may be uploaded via the FBI’s digital media tipline dedicated to this case at fbi.gov/petito

The area is closed to the public and will remain closed until the surveys are complete. The National Park Service, U.S. Forest Service, Teton County Sheriff’s Office, and the Jackson Police Department are coordinating efforts with the FBI.

Laundrie and Petito left in July on a cross-country trek in a converted van to visit national parks in the U.S. West, the AP reported

Police said Laundrie was alone when he drove the van back to his parents’ home in North Port, Florida on September 1. Petito’s family filed a missing persons report on September 11 with police in Suffolk County, New York.

North Port police said late Friday that they are working with the FBI to locate Laundrie. Laundrie’s family told officers they haven’t seen him since Tuesday.