The FBI believes authorities disrupted "a localized terror attack" in its planning stages when they arrested a man after converging on a western Minnesota mobile home that contained Molotov cocktails, suspected pipe bombs and firearms, the agency said on Monday.
Buford Rogers, 24, was arrested Friday and charged with one count of being a felon in possession of a firearm. He remained in federal custody on Monday and it was not clear if 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 on Monday.
Loven declined to elaborate about the location of the alleged target, other than to say it was believed to be in Montevideo, a city of about 5,000 people about 130 miles (209 kilometers) west of Minneapolis. He also declined to say whether Rogers was believed to be acting alone or as part of a group, or if other arrests were expected.
"This is a very active investigation," he said.
In a news release Monday, the FBI said it believed "the lives of several local residents were potentially saved" by the search and arrest, and said "several guns and explosive devices were discovered." The agency said the alleged terror plot was discovered through analysis of intelligence gathered by local, state and federal authorities.
According to a federal affidavit obtained by The Associated Press on Friday, FBI agents from the domestic terrorism squad searched the property at the mobile home park in Montevideo and discovered the Molotov cocktails, suspected pipe bombs and firearms. The affidavit said Buford was there at the time of the search, and one firearm recovered from Buford's residence was a Romanian AKM assault rifle.
In an interview with authorities, Rogers admitted firing the weapon on two separate occasions at a gun range, the affidavit said. Rogers has a 2011 conviction for felony burglary and is not allowed to have a firearm.
Rogers is expected to make his initial appearance in federal court this week. Rogers also has a 2009 misdemeanor conviction for dangerous handling of a weapon, as well as other criminal violations, according to online court records.