FAIRBANKS, Alaska (AP) — A Douglas C-54 Skymaster airplane carrying two people crashed into the Tanana River near Fairbanks on Tuesday and burst into flames, authorities said. No survivors have been found.

The plane took off in the morning from Fairbanks International Airport. It crashed about 7 miles (11 kilometers) from there and “slid into a steep hill on the bank of the river where it caught fire,” according to Alaska State Troopers.

Clint Johnson, chief of the National Transportation Safety Board’s Alaska regional office, said it remained unclear what happened in the time between the takeoff and the crash but the tower operator “saw a large plume of smoke.”

Michaela Matherne was flying from the village of Galena to Fairbanks to catch a flight to New Orleans when her small plane was diverted to verify the coordinates of the crash site.