EDMONTON – A 21-year-old man accused of killing three armoured vehicle guards and injuring another during a robbery at the University of Alberta is believed to be back in Edmonton.

There was no official confirmation, but an RCMP plane landed at the downtown airport just before 2 p.m. MT Wednesday and pulled into a hangar.

Three police cars, two with lights flashing and one with the windows blacked out, were then seen leaving the airport.

“I cannot confirm that with you,” Doris Stapleton, a spokeswoman for RCMP K Division, said when asked if Travis Baumgartner had returned.

“We never comment about prisoners that we escort just for privacy reasons. We never have and we don’t intend to today.”

Baumgartner was being held in B.C. after he was arrested at a U.S. border crossing near Abbotsford on the weekend with $330,000 in a backpack.

Police say Baumgartner was one of five security guards working for G4S Canada who were loading a bank machine at the university just after midnight Friday when shots rang out.

Baumgartner is expected to be formally charged with three counts of first-degree murder and one count of attempted murder.