Racially motivated extremists pose the most lethal domestic terrorism threats to the US, according to an unclassified intelligence report that warned that the threats could grow this year.

The blunt assessment, in a report released by the Office of the Director of National Intelligence, echoes warnings made by US officials, including the FBI director, Christopher Wray, who testified earlier this month that the threat from domestic violent extremism was “metastasizing” across the country.