Local newspaper the Salzburger Nachrichten alleges the men had come into contact with the Paris attackers in Austria, having arrived with false passports.
A foreign intelligence service helped Austrian authorities track them down, but police have declined to reveal their nationality.
Tabloid Kronen Zeitung alleges they have “Algerian or Pakistani” roots and entered Europe through Greece on fake Syrian passports with members of the group that carried out the Paris attacks.
One hundred and thirty people died in a series of coordinated attacks in the French capital last month, 89 of them at the Bataclan concert venue where Eagles of Death Metal were playing a concert.
“Ringleader” Abdelhamid Abaaoud was killed during a police raid in Saint-Denis days after the November 13 massacres.
Eight other people have been identified as taking part in the attacks, including one unidentified suspect.
An international manhunt is under way for Belgian national Salah Abdeslam, the only suspect thought to remain alive.
