(CNN) -- Seven people were killed when a small plane crashed after takeoff Wednesday outside Quebec City in Canada, said Richard Girard, spokesman for Quebec City Jean-Lesage International Airport.
Five of the seven were passengers and two were crew members, Girard said. The victims' names have not been released.
Girard said the twin-engine Beechcraft King Air plane owned by Aeropro had trouble at takeoff and crashed in a private field northwest of the airport around 6 a.m. ET.
Aeropro spokesman Jacques Payeur said crew members called the control tower to say they were having trouble with one engine, but he's unsure why the plane didn't climb, since it should have been able to fly on just the other engine.
Payeur said the plane recently underwent routine maintenance. "The engines were relatively new, fresh from overhaul...I have no reason to believe that it was an engine issue," he said.
Payeur said the captain and the first mate were experienced and qualified.
The Transportation Safety Board of Canada will investigate, Payeur said.
Girard said the flight was headed to Sept-Iles on Quebec's north shore.
The crash caused no traffic problems or flight cancellations at the airport, Girard said.