Officials shut down the international commuter tunnel connecting Detroit with Windsor on Thursday as authorities
investigated a bomb threat.

The Detroit Windsor Tunnel was closed after the threat was called in on the Canadian side, tunnel chief executive Neal Belitsky told The Associated Press.

Initially, traffic going onto plazas on both sides of the tunnel was halted and diverted away from the tunnel. Officials then decided
to clear the tunnel and block off entrances and exits on both sides, tunnel executive vice-president Carolyn Brown said.

Bomb squads from the Detroit and Windsor police departments were called in.

Traffic in both cities was redirected to the Ambassador Bridge.

According to Windsor Police, the tunnel was re-opened around 5 o'clock and nothing was found.