Since a violent mob of President Donald Trump's supporters attacked the U.S. Capitol last week, U.S. officials have repeatedly warned that like-minded domestic terrorists could strike again when President-elect Joe Biden is sworn in as commander-in-chief next week.

But a wide-ranging threat assessment issued Thursday by several federal and local agencies makes it clear that U.S. agencies are preparing for the possibility that Biden's inauguration could inspire additional threats to the U.S. homeland, including foreign influence operations and even drone attacks from extremists.

"Since the incident at the U.S. Capitol, Russian, Iranian, and Chinese influence actors have seized the opportunity to amplify narratives in furtherance of their policy interest amid the presidential transition," the threat assessment noted, citing at least once instance in which a Russian "proxy" promoted claims the rioters at the Capitol last week were actually members of the radical left-wing antifa movement who "disguised themselves" as Trump supporters.

Read more: ABC News