Motorist claiming to have explosive device leads police chase to U.S.-Canada border, fired upon after ignoring commands to surrender

Driver with sign indicating explosive device led Maine State Police on a chase to Canadian border.
Trooper fired shots after motorist attempted to maneuver truck towards Canadian port of entry.
Border crossing was temporarily closed and crime scene technicians and Maine State Police Bomb Squad were expected to be at the scene through the night.
Driver, Tony Holford, 42, of Providence, Rhode Island, was charged with aggravated reckless conduct, terrorizing, and failure to stop.
Maine State Police, state attorney general's office, and Canadian authorities were jointly investigating the incident.