Are all of the Lithuanian records stored in the Lithuanian Archives?
No. Voter registration lists are in Moscow, as are the bulk of the military records. Some police records, as well as other types of records, are located in Moscow and in St. Petersburg. A sizeable quantity of the Lithuanian records for the southwestern area of present day Lithuania are stored in the Suwalki archive in Poland. See the JewishGen InfoFile Vital Records in Poland by Warren Blatt.