Bomb Threat Closes US Canada Tunnel

A bomb threat called into Canadian authorities led to the closure of the tunnel connecting Windsor, Ontario and Detroit, Michigan.

Federal and local police from both countries have responded to the scene, and a Detroit bomb squad was leading the search for explosive devices.

The tunnel is one of the busiest crossings between the two countries.

Travelers were being diverted to the Ambassador Bridge.

The search and investigation are still under way.