Anchorage FBI agents flag 18-year-old from Ohio after chatroom threats

According to court documents released on Monday, FBI agents based in Anchorage were responsible for flagging a young man who joined the Internet chat room iFunny under the name "ArmyOfChrist."

Prosecutors say an 18-year-old Ohio man charged with making online threats against federal agents was arrested at a home filled with guns and a huge stockpile of ammunition.

Court documents say that the FBI agents in Anchorage found that Justin Olsen also wrote that he supported mass shootings and attacks on Planned Parenthood.

In March, FBI Anchorage asked for a subpoena for iFunny for the ArmyOfChrist username, and got an email address of the user from the chatroom, according to a court affidavit.

Federal prosecutors say Olsen has been under investigation since February, but they decided to act now because of recent mass shootings across the U.S. Olsen, who lives with his father, was arrested last week. He was charged Monday with threatening a federal officer.

Court documents say Olsen told the FBI during his arrest that the comments were only a joke.

A message seeking comment was left with his attorney.

Agents seized 15 rifles, 10 semi-automatic pistols and roughly 10,000 rounds of ammunition during the arrest.