The F.B.I. is investigating 37 in the killing of a Capitol Police officer by a pro-Trump mob.

The F.B.I. is investigating 37 individuals associated to the killing of Officer Brian Sicknick, the Capitol Police officer who died after being injured through the pro-Trump riot on Jan. 6, in response to an F.B.I. memo despatched to the non-public sector and others on Friday. The Times obtained a duplicate of the report.

Mr. Sicknick was struck with a fireplace extinguisher as a violent mob flooded the halls of Congress, in response to two legislation enforcement officers. Lawmakers hid beneath their desks from violent protesters after President Trump inspired them throughout a rally to move to the Capitol. Mr. Sicknick died within the hospital the place he was getting remedy for his accidents.

Fourteen different Capitol Police officers have been injured within the mob final week, the memo stated.

Law enforcement officers are bracing for extra unrest within the days main as much as the inauguration.

Since the Jan. 6 siege, intelligence officers have seen Chinese, Iranian and Russian efforts to fan the violent rhetoric, in response to a joint risk evaluation dated Thursday. The amplification is in keeping with earlier efforts to make the most of divisive Republican rhetoric, such because the Russian efforts to amplify disinformation unfold by Mr. Trump through the marketing campaign in regards to the safety of mail-in voting.

The inspectors basic for a number of federal companies, together with the departments of Justice and Homeland Security, introduced on Friday that that they had opened an investigation into the response to the riot on the Capitol. The watchdogs will even have a look at how federal companies shared intelligence forward of the riot.

Zolan Kanno-Youngs and Julian E. Barnes contributed reporting.