LAGOS, Nigeria -- Nigerian drug agents say a newly elected senator will appear in court to fight his extradition to the U.S. on 20-year-old drug charges. The case is related to the TV hit "Orange is the New Black."

Senator-elect Buruji Kashamu, 56, has declared his innocence. Chicago prosecutors charge he was the kingpin of a heroin trafficking ring in the 1990s.

After years of inaction, the U.S. has requested his extradition. The move comes days before senators are to be sworn into the new legislature on Friday.

Drug agents surrounded Kashamu's home before dawn on Saturday. The drug agency says he is under house arrest. Kashamu's spokesman says it's an illegal siege and they have no arrest warrant.