Whatcom County Undersheriff Jeff Parks says deputies were called Tuesday morning to assist federal agents in a forested area with logging roads about 5 miles east of Sumas. He says it's a "known smuggling corridor."
Parks says the initial report was of shots fired and one person detained and one at large.
Abbotsford, British Columbia, Police Constable Ian MacDonald says the incident happened on the U.S. side near Canada's Huntingdon border crossing.
MacDonald says Canadian police were told the second suspect may have made his way into Canada.
Police have set up road blocks and a helicopter is scouring the area.