The ISIS propaganda machine never really stops churning, but in the wake of attacks on Paris last week there's heightened attention around new videos the terror group is releasing with threats against the USA and its European allies. 

In a video that surfaced today, an ISIS fighter threatens Washington D.C., saying, "We started with [Paris] and we shall finish with the false White House ... We shall render [the White House] black with our fire, Allah willing," according to The Daily Mail. Another man in the video threatens a "conquest of Rome," CNN reports.

A day earlier, an ISIS video surfaced with threats of attacking sites in New York, including Times Square and Herald Square.

And a day before that, a different video came to light with a more vague threat against Washington, D.C. In that video a jihadi is translated as saying "... as we struck France in the center of its abode in Paris, then we swear that we will strike America at its center in Washington."

Outside of these videos, the New York Times reported Wednesday that the FBI has warned Italy that terrorists may be targeting sites in Milan and Rome, such as St. Peter's Basilica and La Scala opera house. St. Peter's Square at The Vatican recently appeared on the cover of ISIS's online magazine.

After yesterday's video with threats against New York, Mayor Bill de Blasio made a statement saying, “We will not submit. It's crucial that people go about their normal business recognizing the NYPD is providing extraordinary protection for the people of this city.”