MANDAN, N.D. - The Morton County Sheriff's Office here has released the names of three people who died Sunday night, Nov. 18, when a Bismarck Air Medical plane crashed northwest of Mandan.

The three victims are Todd Lasky, 48, of Bismarck, the pilot of the plane; Bonnie Cook, 63, of Bismarck, a nurse; and Chris Iverson, 47, of Mandan, a paramedic.

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According to a release from CHI St. Alexius Health, the plane, which was flying to Williston to assist in a patient transport, went down prior to arrival.

The three victims were the only people aboard the plane when it crashed.

Around 11 p.m. Sunday, the Bismarck Airport tower reported the aircraft was missing about a half-hour after taking flight.

Searchers with the Morton County Sheriff's Office, Mandan Rural Fire Department, Civil Air Patrol and an Air Force Rescue Team located the crash site around 2 a.m. Monday, Nov. 19.

Cellphone forensics and radar analysis helped track the plane's last location, according to a Morton County press release.

Morton County spokeswoman Maxine Herr said the crash site is about 15 to 20 miles northwest of Mandan. The fuselage and other debris are spread over "a large area" in a "remote pasture" about 3 miles west of state Highway 25 northwest of Mandan, according to the press release.

The National Transportation Safety Board and the Federal Aviation Administration will investigate the incident. The cause of the crash remains under investigation.

The plane was a Cessna 441 turboprop that was built in 1982, according to FAA records.