The US Capitol Complex is in lockdown after shots were fired inside the Capitol Visitor's Centre in Washington DC after a man pulled out a gun at the security checkpoint. The gunman "drew what appeared to be a weapon and pointed it at officers," US Capitol Police Chief Matthew R. Verderosa told the Washington PostAll visitors are required to be screened by metal detectors as they enter. 

At least one policeman opened fire and another officer was shot before the gunman was captured and taken to hospital for treatment.  The incident occurred around 3pm on Easter Monday, American time.

The US Congress was in recess at the time, so few politicians were present, however thousands of tourists were there to visit over the Easter long weekend and participate in the President's annual Easter Egg Roll. The White House has since been put into lockdown. 

The Buro daily: Washington is in lockdown after a shooting at the White House