Federal agents have shut down an elaborate, 360-foot drug-smuggling tunnel dug underneath the U.S.-Canadian border the first such passageway discovered along the nation's northern edge, officials said Thursday.

The tunnel ran from a quonset hut on the Canadian side and ended under the living room of a home on the U.S. side, 300 feet from the border. Built with lumber, concrete and metal reinforcing bars, it was equipped with lights and ventilation, and ran underneath a highway.

The passageway was 3{ to 4 feet high and wide, and ran anywhere from 3 to 10 feet below ground, authorities said.

"They were smart enough to build a sophisticated tunnel. They weren't smart enough to not get caught," McKay said.

Although numerous smuggling tunnels have been found on the U.S.-Mexican border, this was the first discovered along the border with Canada, McKay said. Canadian authorities learned of the tunnel in February and alerted U.S. officials.