(This version of the Jan 6. story corrects the third-to-last paragraph to show the Transportation Safety Board is an independent investigative agency, not a Canadian regulator))

(Reuters) - Dozens of passengers were evacuated from an aircraft at Toronto’s Pearson Airport late on Friday after a plane under tow struck an arriving jet that was waiting to park, sparking a small fire, the airport authority said.

Fire and emergency services responded to the collision between the two planes from Sunwing Airlines and Westjet Airlines WJA.TO, which happened at 6:19 p.m. (2319 GMT), the Greater Toronto Airport Authority said in a statement.

Calgary-based Westjet said it had unconfirmed reports of “minor injuries” in the incident, but that all 168 passengers and six crew members on board its plane were safe and accounted for.

The jet, a Boeing 737-800, had just arrived in Toronto from the resort of Cancun, Mexico, and was waiting to proceed to the gate at the time of the collision, Westjet said.

Sunwing, part of the privately held Sunwing Travel Group, said there were no passengers or crew onboard its plane at the time of the collision and that the aircraft was being towed by ground handler Swissport International Ltd.

A spokesman for the Transportation Safety Board, a Canadian agency that investigates transportation incidents, said a team was headed to the airport to investigate.

Swissport, a provider of ground and cargo handling services for the aviation industry, confirmed late on Friday that one of its employees was involved in the collision and said it would cooperate in the investigation.

“The incident occurred when our employee was pushing back the plane from the gate,” Pierre Payette, Swissport Canada Handling Inc vice president of operations for Toronto, said in a statement emailed to Reuters. “The impact caused a small fire in the empty aircraft’s exterior generator, which was quickly extinguished by the Fire Department.”