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'Gunshots' at US Capitol in Washington US Capitol shooting: Gunman wounds Capitol police officer
(35 minutes later)
Gunshots reported at visitor centre at US Capitol in Washington DC and workers told to take shelter Gunshots have been reported at the visitor centre at the US Capitol in Washington and workers have been told to take shelter.
This breaking news story is being updated and more details will be published shortly. Please refresh the page for the fullest version. The Capitol's Sergeant-At-Arms said the gunman has been caught and one police officer was wounded.
If you want to receive Breaking News alerts via email, or on a smartphone or tablet via the BBC News App then details on how to do so are available on this help page. You can also follow @BBCBreaking on Twitter to get the latest alerts. The Capitol building is on lockdown due to the security threat, according to an email sent to congressional staffers.
Washington's city police called it an "isolated" incident, saying there is "no active threat" to the public.
US Congress is on recess for the Easter holiday, but some members of Congress and staff members were on site.
To enter the US Capitol or any Senate or House office buildings, visitors must go through a metal detector and weapons are not permitted.
Multiple members of Congress have posted to social media, reporting that their staff is safe and sheltering in place.
In 1998, two police officers were killed when an attacker got past security at the Capitol. Security has been tightened since then.