SASKATOON -- The Transportation Safety Board says ice buildup in fuel lines was the cause of a crash in southeastern Saskatchewan on Easter weekend.

Spokesperson Peter Hildebrand says when the pilot switched fuel tanks, ice in the fuel lines to the other tank clogged off any flow, resulting in the loss of engine power and forcing the pilot to make an emergency landing in a farmer's field.

Hildebrand says planes have water draining procedures in place to prevent incidents like this and they may never know how the water got in the fuel tank and remained after takeoff.

The pilot of the plane remains in hospital with non-life-threatening injuries and five other passengers suffered only minor bumps and bruises.

The board's investigation is now over and Hildebrand says it's now up to Transport Canada to see if there's anyone to blame.

The small plane was on a local flight, departing from and arriving back at Carlyle.