Travis Baumgartner, wanted for allegedly slaying three guards in an armoured car robbery in Edmonton Friday, was arrested by US Border Patrol agents on the American side of the Aldergrove border crossing Saturday.

The 21-year-old was attempting to cross into the United States, according to the Edmonton Police.

Baumgartner was apparently still driving his blue Ford F-150, with his mother’s stolen license plate attached.

“We’re grateful to the border officials at Lynden, Washington, for their excellent work in arresting a man we believe was armed and extremely dangerous,” said Supt. Bob Hassel of the Edmonton Police Service’s criminal investigations division.

Police left Edmonton Saturday to bring both Baumgartner and his truck back to Alberta.

The 21-year-old suspect was an employee of the armoured car company. He was part of a five-person team dropping off cash at ATMs on the University of Alberta campus early Friday morning when four of his fellow guards were shot, three fatally. The fourth is in hospital with serious injuries.

A representative of the company, G4S Cash Solutions, applauded the police both in Edmonton and elsewhere for capturing the wanted man.

Langley RCMP were not involved in the arrest, which apparently took place at or near the border crossing itself on the U.S. side.

Representatives of Canadian Border Services were not immediately available for comment.