Police are still investigating a bomb threat that forced a flight to make an emergency landing in Saskatoon on Saturday morning.

Investigators say they've searched the plane and found no explosive device on board. They now believe the call about the threat originated from a phone in Ontario.

The investigation is being conducted by the Ontario provincial police with assistance from Saskatoon police.

They're working to find out the origin of the phone in Ontario, from which the threat was called in.

Though passengers and crew all made it off the plane without incident, it was a tense experience.

So far there have been no arrests.