The White House was blockaded by Secret Service about 20 minutes after an aircraft violated Washington's airspace today.

The US Secret Service's announcement said the blockade took place shortly due to the "risk of violating restricted airspace in the capital area" at approximately 9am local time (21h Hanoi time). .

The roads around the White House were blocked by secret services and no one was allowed near the area. Officials also evacuated workers who are building new fences for the White House. The US Secret Service did not say what happened to the aircraft that violated airspace.

Senior security officials were summoned to jointly monitor the situation, but the plane was "not considered hostile", the North American Air Command wrote on Twitter, adding that the fighters Their have been deployed to the scene.

It is not clear if President Donald Trump is in the White House when the blockade takes place. The Capitol Hill police then confirmed the situation was back to normal after about 20 minutes.

Security blockades around the White House are not uncommon, often occurring when suspicious signs appear in the area. The US government regulates restricted airspace in the White House area and the US Congress building in Washington City to guard against the risks of 9/11, but some small private jets occasionally get lost in this area.