White House Chief of Staff Mark Meadows speaks to reporters at the White House on October 21, 2020 in Washington, DC.

Tasos Katopodis | Getty Images News | Getty Images

The House Special Committee investigating the January 6 deadly uprising announced Thursday that it issued summons late Thursday to four of former President Donald Trump’s closest allies, including his former chief of staff Mark Meadows and his former close adviser Steve Bannon.

The subpoenas, which were also sent to former White House Deputy Chief of Staff Daniel Scavino and former Defense Department official Kashyap Patel, instruct witnesses to produce materials and appear at the testimony in the coming weeks, the committee said in a press release with.

The subpoenas mark a sharp escalation in the committee’s investigation into a final analysis of the January 6 invasion in which hundreds of Trump’s supporters forced Congress to go into hiding and temporarily shut down the process of confirming President Joe Biden’s victory Failed.

“The committee is investigating the facts, circumstances and causes of the attack on the 6th. Bennie Thompson, D-Miss., The chairman of the committee, in a statement Thursday.