The Cannon House Office Building at the US Capitol was evacuated after an audible alarm went off due to a malfunctioning electrical panel, the US Capitol Police said in a statement on Thursday.

The Cannon House Office Building at the US Capitol in Washington was evacuated after an audible alarm went off, US media reported on Thursday.

The US Department of Homeland Security (DHS) has bolstered security at federal facilities around the country following the discovery of packages containing explosive devices in recent days, DHS Secretary Kirstjen Nielsen said in a press release on Thursday.

The Trump administration will provide all necessary assistance to the Federal Bureau of Investigation (FBI), police and the Secret Service as they search for those responsible for a series of bombs sent to high-profile Democrats and others, Press Secretary Sarah Sanders said in an interview on Thursday.