Rescue operations are underway in Alaska, after a plane crashed near Fairbanks on Tuesday morning, according to Alaska officials.

Details on the crash have not been released so far, but the crash involved a Douglas DC-4 plane, according to Anchorage Daily News. It is unclear how many people were on the plane at the time of the crash.

A spokesman for the Fairbanks International Airport told the public to stay away while the investigation is ongoing.

“We acknowledge the ongoing situation involving the Douglas DC-4 aircraft on the Tanana River near Kallenberg Road,” the airport said in a statement. “Alaska State Troopers are actively leading the response and we are cooperating with them.”