The F.B.I. is investigating 37 people in connection with the murder of police officer Brian Sicknick, who was injured after an injury during the pro-Trump uprising on Jan. 6, according to an F.B.I. Memo sent to the private sector and others on Friday. The Times received a copy of the report.
According to two police officers, Mr. Sicknick was hit by a fire extinguisher when a violent mob flooded the halls of Congress. Legislators hid under their desks from violent protesters after President Trump encouraged them to go to the Capitol during a rally. Mr. Sicknick died in the hospital where he was being treated for his injuries.
Fourteen other Capitol police officers were injured in the mob last week, the memo said.
Law enforcement officers brace themselves for further unrest in the days leading up to the inauguration.
Since the January 6 siege, intelligence officials have seen Chinese, Iranian and Russian efforts to promote the violent rhetoric. This emerged from a joint threat analysis on Thursday. The reinforcement is in line with previous efforts to exploit divisive Republican rhetoric, such as Russian efforts to reinforce the disinformation provided by Mr Trump during the campaign on postal safety.
Inspectors-general of several federal agencies, including the ministries of justice and homeland security, announced Friday that they had opened an investigation into the response to the Capitol uprising. The watch dogs will also investigate how federal agencies exchanged information prior to the riot.
Zolan Kanno-Youngs and Julian E. Barnes Contribution to reporting.