The FBI believes authorities disrupted a planned terrorism attack when they arrested a man after converging on a mobile home that contained Molotov cocktails, suspected pipe bombs and firearms in a small western Minnesota city, the agency said Monday.

Buford Rogers, 24, of Montevideo, was arrested Friday and charged with one count of being a felon in possession of a firearm. He remained in federal custody Monday. It was not clear whether he had an attorney.

“The FBI believed there was a terror attack in its planning stages, and we believe there would have been a localized terror attack, and that’s why law enforcement moved quickly to execute the search warrant on Friday to arrest Mr. Rogers,” FBI spokesman Kyle Loven said Monday.

Rogers appeared in court Monday wearing a construction company T-shirt, jeans and work boots. He answered “Yes, sir” and “No, sir” to questions from U.S. Magistrate Judge Tony N. Leung.

Leung ordered Rogers held pending a detention hearing Wednesday, citing “serious concerns” raised in the criminal complaint.

Buford Rogers was arrested May 3 during a raid on a mobile home in Montevideo, Minn. (AP/AP)

Loven declined to elaborate about the location of the alleged target of an attack, other than to say it was believed to be in Montevideo, a city of about 5,000 people about 130 miles west of Minneapolis. He also declined to say whether Rogers was thought to be acting alone or as part of a group, or if other arrests were expected.

— Associated Press