National Transportation Safety Board investigators have taken the flight-data and cockpit voice recorders after a near miss in the skies in Toronto.
Two Porter Airlines crew members suffered minor injuries when the plane was forced to take evasive action to avoid an object thought to be a drone.
The Dash 8 turboprop -- carrying 54 passengers -- was arriving from Ottawa about 7:30 when the crew spotted the object.
The aircraft was flying at just under three thousand metres over Lake Ontario when the incident occurred.