Two people were killed in a small plane crash Saturday morning in southern Utah.

The plane crashed about 4 a.m. in the northeast corner of Washington County, about one mile from the Kane County line and three miles from the Iron County border, according to the Washington County Sheriff's Office. The National Transportation Safety Board is on the scene and heading up the investigation.

The Washington County Sheriff's Office dispatched deputies and search-and-rescue personnel to the site about 11 a.m., after being notified of the crash by the Utah Wing of the U.S. Civil Air Patrol.

The CAP received an alert early Saturday that a small aircraft was overdue on a flight from Bountiful to Colorado City, Ariz., and dispatched aircraft and crews from Ogden and Salt Lake City at first light, said Lt. Susan Chamberlain, public affairs officer.

The crash site was located about 10 a.m. by CAP crews, who stayed in communication over the crash site until local law enforcement ground searchers reached the site, Chamberlain said.

As of 8:30 p.m., Washington County Sheriff's officials did not know the identity or gender of the two people killed, spokeswoman Stephanie Hayden said.

There were no other passengers on the plane, Hayden said. NTSB officials are expected to continue the investigation today, identify the victims and notify their families, she said.

A small fire ignited by the crash made it difficult for rescue crews to reach the crash site, Hayden said. Color Country Fire quickly got the fire under control, and no structures were threatened, she said.