Washington: The US Capitol complex was briefly placed on lockdown on Tuesday after reports of a possible active shooter around the complex.

According to police, the Capitol Hill and all buildings in the Capitol complex were placed on lockdown around 4:20 p.m. local time while police were checking reports that a suspect with a gun appeared outside the building of the US Labour Department two blocks from the Capitol Hill.

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No shots were fired, said authorities.

The all clear was given at 4:45 p.m. local time.

It was the second time in a week that the Capitol was locked down. It was briefly locked down on Friday after a false alarm of an active shooter.