(Refiles to remove extra 0 in traffic figure, last graph)
July 16 (Reuters) - The Ambassador Bridge, a busy international border crossing linking Windsor, Ontario, with Detroit, was closed Monday night, officials said. No immediate reason was given by police.
The shutdown comes less than a week after the Detroit Windsor Tunnel, a nearby cross-border route, was closed by a bomb threat.
Neal Belitsky, the president of the privately owned company that operates the tunnel, told Reuters the Ambassador Bridge shutdown was also the result of a bomb threat, but Canadian and U.S. police did not immediately confirm that.
Scott Vetor, a supervisor with the Windsor Police, said the Ambassador span was shut to traffic going in and out of Canada shortly before 8 p.m. ET "It's still shut down now," Vetor said shortly after 9 p.m.
Traffic was being diverted to both the Detroit Windsor Tunnel as well as the Blue Water Bridge that links Port Huron, Michigan, with Sarnia, Ontario, Vetor said.
The Ambassador Bridge, which opened in 1929, is the busiest commercial border crossing in North America and is a particularly important route for commercial traffic. It is privately owned.
More than 25,000 vehicles, many of them trucks, travel every day over the bridge, which passes over the Detroit River. (Reporting by James Kelleher in Chicago; Editing by Philip Barbara)