AUBURN, Maine (AP) The U.S. Border Patrol says a Mexican man who’s been in the United States illegally for more than two decades was in possession of drugs when he was detained in Maine.

Border Patrol agents working at a transportation hub on Tuesday in Auburn, Maine, discovered that the man had illegally entered the United States in Douglas, Arizona, in 1997.

They said he lacked proper documents to be in the United States and was in possession methamphetamine, marijuana and drug paraphernalia. Officials say the man was transferred to the custody of Immigration and Customs Enforcement for removal proceedings.

Jason Owens, chief of the Border Patrol in Maine, said that without the routine bus operation “an admitted criminal alien and his dangerous drugs would have gone undetected.”