A member of an armed group detaining migrants at the border has been arrested by the FBI

The FBI has arrested a member of an armed militia that had detained hundreds of migrants at the border this week, the New Mexico attorney general's office said Saturday. Larry Mitchell Hopkins, 69, is a member of an armed group that had reportedly detained migrants near Sunland Park, New Mexico, state Attorney General Hector Balderas said in a statement. Hopkins -- also known as Johnny Horton Jr. -- was arrested on felony charges of being in possession of firearms and ammunition, according to a statement from the FBI's Albuquerque field office. Earlier this week, videos posted online purported to show migrants being held by a militia known as the United Constitutional Patriots before being turned over to US Border Patrol. Hopkins is expected to make a first appearance in court on Monday, the FBI said. CNN was unable to determine Saturday whether he was represented by an attorney...MORE