India, April 12 -- A Pennsylvania man is now in federal custody after allegedly threatening to "assassinate" Donald Trump, Elon Musk, and several government officials.

32-year-old Shawn Monper of Butler, Pennsylvania, made the threats in comments on YouTube videos using the username 'Mr Satan,' per federal criminal complaint.

The FBI was tipped off by Google on Tuesday after it flagged disturbing comments posted under political livestreams and videos. One of those comments, posted under a March 4 live stream of Trump addressing a joint session of Congress, read: "I'm going to assassinate him myself," according to a criminal complaint.

"Nah, we just need to start killing people, Trump, Elon, all the heads of agencies Trump appointed, an...