GRANITE FALLS — A California man was killed and a Texas man was injured when a jet aircraft crashed near Granite Falls on Monday afternoon, the Yellow Medicine County Sheriff’s Office said. The incident is under investigation by the Federal Aviation Administration and the National Transportation Safety Board.

On Tuesday the Sheriff’s Office released the names of the two people who were on board the aircraft. Mark Ryan Ruff, 43, of Dallas, was injured in the crash. David Colin Dacus, 49, of San Francisco, was pronounced dead.

Around 5:23 p.m. Monday, the Sheriff’s Office received a report from air traffic control about a jet experiencing engine trouble near the Granite Falls municipal airport. The jet was a 1979 Aero L-39 Albatros with the registration number of N339L, the Sheriff’s Office said in a news release.

According to the Aero aircraft manufacturer’s website, the L-39 Albatros is a training and light fighter jet that was produced in the Czech Republic from the late 1960s until 1995. According to the Aero website, around 700 L-39 aircraft are still in operation, and are used by 20 acrobatic teams.

Emergency personnel were dispatched to the airport, and at about 5:32 p.m., a 911 call was received reporting the plane had crashed near Minnesota Highway 23, just north of the intersection with Yellow Medicine County Road 39.

When emergency responders arrived on the scene, Ruff was located standing alongside the highway. He received medical attention, the Sheriff’s Office said. Dacus was pronounced dead at the scene.

While at the crash scene, personnel found the jet had an unspent cartridge used for the ejection seats, the Sheriff’s Office said. The Bloomington Bomb Squad and the 148th Fighter Wing of the Air National Guard were called for assistance. The cartridge was removed from the crash site, and a controlled explosion was performed on it, the Sheriff’s Office said.

The FAA and NTSB will be conducting a full investigation into the crash, including removing the wreckage and examining it at a different location, the Sheriff’s Office said.

Assisting the Sheriff’s Office with the crash were Granite Falls Police and Fire, Avera Granite Falls Ambulance, the Minnesota State Patrol, MnDOT, the Minnesota DNR, the Chippewa County Sheriff’s Office, Bloomington Bomb Squad, the 148th Fighter Wing, Xcel Energy, BNSF Railroad, the Upper Sioux Community, the Minnesota Pollution Control Agency, Avera Granite Falls Hospital and the Midwest Medical Examiner’s Office.