The pilot of the 737 aircraft, who described the two female passengers as being disruptive "in a serious manner," reported to NORAD (North American Aerospace Defence Command) while the plane was in U.S. airspace that the aircraft was "under threat."
Officials with NORAD's Canadian sector in Winnipeg told CBC News that they scrambled two Canadian Forces CF-18 fighters from CFB Bagotville in Quebec to intercept Sunwing Flight 656 and escort it back to Pearson.
Police officers were called to the airport around 8 p.m. ET and the two passengers were arrested when the plane landed, said George Tudos with Peel Regional Police.
"At 7:15 p.m. we received a call that there was a Sunwing flight that was being diverted back to Pearson due to two female parties on board that were quite disruptive," Tudos told CBC News.
"It was escorted by military planes back to Pearson, where it was met by our airport officers. We are continuing the investigation to find out what happened and are speaking to witnesses who were on the flight. We take all situations seriously and we are going to make sure that plane is safe before it leaves the gate."
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