The United States State Department designates Boko Haram as a "terrorist" group.
U.S. Secretary of State Mike Pompeo accuses House Democrats of attempting to "intimidate" and "bully" five State Department officials whom key congressional committees have asked to interview as part of an impeachment inquiry into President Donald Trump. The House Democrats in turn issue a warning to Pompeo to stop "intimidating" witnesses, telling Pompeo that it "is illegal and will constitute evidence of obstruction of the impeachment inquiry" into President Trump.
Nigeria bans international humanitarian organization Action Against Hunger for allegedly providing food and medicine for Boko Haram militants in the north-east of the country. Action Against Hunger denies the Nigerian military's accusations.