MOOSE, Wyo.—Authorities say a body discovered Sunday in Wyoming is believed to be Gabrielle “Gabby” Petito. The FBI said the body was found by law enforcement agents who had spent the past two days searching campgrounds. The cause of death not yet been determined, said FBI Supervisory Special Agent Charles Jones. “Full forensic identification has not been completed to confirm 100 percent that we found Gabby, but her family has been notified,” Jones said. “This is an incredibly difficult time for (Petito’s) family and friends.” An attorney who has been acting as a spokesman for the Petito family could not be reached immediately for comment. An undeveloped camping area on the east side of Grand Teton bordering national forest land will remain closed until further notice while the investigation continues, Jones said. Jones said investigators are still seeking information from anyone who may have seen Petito or Laundrie around some …