The congressional committee investigating the Capitol riots on January 6 has formally subpoenaed former President Donald Trump (Picture: AP)

Former President Donald Trump was issued a subpoena to testify before a congressional committee investigating the events of the riot at the US Capitol on January 6, 2021.

The House Select Committee previously voted unanimously to subpoena the former president last week.

‘This is a question about accountability to the American people. He must be accountable. He is required to answer for his actions,’ Committee Chair Representative Bennie Thompson said.

Trump has not said whether or not he will comply with the subpoena, which compels him to testify under threat of contempt of congress.

The subpoena to former President Donald Trump, issued by the House committee investigating the Jan 6, 2021 attack on the U.S. Capitol (Picture: AP)

The nine-member panel sent a letter to the former president’s lawyers, demanding his testimony under oath by mid-November and outlining a series of corresponding documents (Picture: AP)

In an unrelated investigation by New York Attorney General Letitia James into his his business practices, Trump refused to answer a single question and pleaded his Fifth Amendment right against self-incrimination.

The House of Representatives has vote four times to hold individuals in contempt of congress for refusing to comply with committee subpoenas or provide documents.

One of those held in contempt, former White House advisor Steve Bannon, was sentenced to four months in prison earlier today for his refusal.

This is a breaking story, check back for updates…

Trump has not said whether or not he will comply with the subpoena, which compels him to testify under threat of contempt of congress.