Investigators said the Cessna plane that went down near Kenora on Friday, killing three people from the U.S., crashed while it was trying to land.
Peter Hildebrand, regional manager for the Transportation Safety Board, said it's still early in the investigation, but it appears the Cessna 182 was trying to land on Chappie Lake when it hit some rocks on the shore.
"The aircraft essentially cartwheeled, and it came apart," he said. "[There was] very extensive damage. Virtually a non-survivable type of crash."
Hildebrand said a team of investigators from his office went to the crash site Saturday.
He said the area is so remote that they had to be flown in by helicopter. Hildebrand also said pieces of wreckage could be seen at the site.
He said the plane's engine was fully powered as it hit the rocks.
"The aircraft was proceeding in a southerly direction, that is across the lake, and struck the rocks at the south end of the lake," he said. "So we could see some marks on the rocks under the water and of course it ran up on shore and cartwheeled basically and came apart."
Hildebrand said mechanical malfunction has been ruled out.
"So far we have no technical problems with the aircraft that would precede the accident."
Ontario Provincial Police said the victims were 41-year-old Nikolas Rajala, 40-year-old Teresa Rajala, and 36-year-old Lynn Bohanon, all of Grand Rapids, Minn.
Police said they were staying at a local fishing lodge and were planning to fish on Chappie Lake Friday.