Police respond to potential explosive device at US-Canada border.

A driver with a sign indicating an explosive device on board led Maine State Police on a chase to the Canadian border, where a trooper fired shots after the motorist attempted to maneuver the truck toward the Canadian port of entry. The man surrendered without injury and was charged with aggravated reckless conduct, terrorizing, and failure to stop. The border crossing was temporarily closed, and officials said there was no danger to the public. Maine State Police, the state attorney general's office, and Canadian authorities were jointly investigating the incident.