ABC's Ann Compton reports: All car and pedestrian traffic has been stopped for several blocks in a perimeter around the White House this morning as law enforcement inspects a dump truck there.
The Secret Service tells ABC News that a canine team “alerted” while inspecting a dump truck that was scheduled to come into the construction complex on the White House's North Lawn.
There has been a steady stream of dozens of heavy construction vehicles and scores of work crews at the White House working on a two-year project that has torn up the North Lawn of the complex.
The truck which raised concerns was on a manifest of vehicles cleared into the White House for scheduled work. Like all vehicles, it is screened at a distant access point before being allowed anywhere near the White House itself.
The US Secret Service closed down an unusually large area around the White House while the truck was being inspected. Cross town city traffic along busy H Street was blocked for two long blocks. All tourists and foot traffic was cleared from Lafayette Park. The Secret Service even banned White House crews and correspondents from using their camera positions on the White House lawn.
UPDATE: The vehicle in question was cleared and no hazards were found. Back in the White House reportsers have been given the all clear. Reporters are now free to move about and construction crews are back at work on the "Big Dig" on the North Lawn. Traffic will reopen momentarily.