The United States an unknown man stabbed the car in the Capitol hill today in Washington and used a gun to kill himself.

Officials said the man crashed into the barrier was erected on the East Capitol and Road No. 2 in Washington at about 4am this morning (15:00 in Hanoi).

After the collision, the car caught fire.

The police checked the scene of the car to the barrier near the Capitol hill in Washington, USA, on August 14.

Police said there was no sign that the man was targeting the National Assembly MP.

Both the House of Representatives and the US Senate are in the break and there are very few employees working in the Capitol hill complex at the time.

The US Federal officials warned of the risk of attacks on government buildings after the FBI earlier the week searching former President Donald Trump's mansion in the Mar-A-Lago Resort,

In the days after the search, a series of violent threats appeared online, such as killing all officials or assassinating Garland, referring to the Justice Minister Merrick Garland, who personally criticized himself.

The biography and communication of the Federal Judge, who signed a search order for Mr. Trump's mansion, was also deleted from the Florida court website after he became a threatened target.