The move by the two Silicon Valley companies came the day when Twitter permanently suspended Trump's account due to "risk of further incitement of violence".

Singh was Press Secretary to Vice President-elect Kamala Harris on the Biden-Harris campaign.

Trump, who lost the November 3 elections, would be succeeded by Joe Biden on January 20 as mandated by the Constitution.

Reiterating her demand to remove US President Trump from office, she said, "The situation of this unhinged president could not be more dangerous, and we must do everything that we can to protect the American people from his unbalanced assault on our country and our democracy."

US Capitol Police Officer Brian D Sicknick was injured while engaging with protesters on Wednesday and returned to his division office, where he collapsed.

"As associate attorney general, the number three job at the department, I nominate Vanita Gupta. A woman I've known for some time. One of the most respected civil rights lawyers in America," Biden told reporters in Wilmington, Delaware as he announced some of the key nominations in the Justice Department on Thursday.

'To those who engaged in the acts of violence and destruction, you do not represent our country. And to those who broke the law, you will pay'

Two of the US Cabinet members -- Education Secretary Betsy DeVos and Transport Secretary Elaine Chao -- have resigned over the storming of the Capitol by Trump supporters. US Capitol Police Chief Steven Sund has also announced that he would resign this month after he faced criticism for failing to prevent Trump supporters from storming the building.

"The president's dangerous and seditious acts necessitate his immediate removal from office," House Speaker Nancy Pelosi and Senate Democratic Leader Chuck Schumer said in a joint statement on Thursday.

The United States on Thursday announced that it will modify the selection process for H-1B visa, giving priority to salary and skills instead of the current lottery procedures. The final rule to be published in the federal register on January 8, officials said, is aimed to protect the economic interests of US workers and better ensure the most highly skilled foreign workers benefit from the temporary employment programme. The H-1B visa is a non-immigrant visa that allows US companies to employ foreign workers in specialty occupations that require theoretical or technical expertise. The technology companies depend on it to hire tens of thousands of employees each year from countries like India and China.

The possibly first ever blocking of a head of a state by Facebook comes in the wake of the unprecedented storming of the United States Capitol by Trump's supporters on Wednesday and thus disrupting the constitutional process of counting and certification of the Electoral College votes of the presidential elections.

In an unprecedented assault on democracy in the US, thousands of supporters of outgoing President Donald Trump stormed the Capitol building here and clashed with police, resulting in four deaths and interrupting a constitutional process by Congress to affirm the victory of President-elect Joe Biden and Vice President-elect Kamala Harris in the election.

US President-elect Joe Biden on Thursday nominated Indian-American Vanita Gupta to be the associate attorney general and roped in Judge Merrick Garland for the position of attorney general.

A joint session of the US Congress on Thursday formally certified the electoral victory of Joe Biden as the next US president and Kamala Harris as the vice president in the November 3 election. The formal certification by the joint session came in the wee hours of Thursday local time.

'To those who wreaked havoc in our Capitol today, You did not win. Violence never wins. Freedom wins. And this is still the people's house.'

'As someone who worked in the halls of Congress, I was deeply disturbed by what I saw today,

'This is not who we are. What we are seeing is a small number of extremists dedicated to lawlessness'

'For the first time since the War of 1812, the United States Capitol was breached today'

For two months now, a political party and its accompanying media ecosystem has too often been unwilling to tell their followers the truth -- that this was not a particularly close election and that President-elect Biden will be inaugurated on January 20, he said.

Earlier, Twitter, Facebook and YouTube removed a video of Trump in which he repeated unfounded claims that the election was stolen from him.