Former CIA employee Edward Snowden, who officially filed an application for temporary asylum in Russia on Tuesday, may spend up to seven more days in the transit area of Moscow's Sheremetyevo Airport or at a center for refuge seekers, Vladimir Volokh, the head of the Russian Federal Migration Service's (FMS) public council, told Interfax on Wednesday.

"He may spend up to a week there," said Volokh, who formerly served as a deputy head of the FMS.

FMS chief Konstantin Romodanovsky told Interfax on Tuesday that the FMS had received Snowden's application for temporary asylum and would make a decision on it within three months.

Snowden filed an application for temporary asylum in Russia with the Federal Migration Service on July 16. Presidential press secretary Dmitry Peskov told Interfax that Snowden's application would be processed by the FMS, not by the Kremlin.

Snowden fled to Hong Kong in May 2013 and then released classified information regarding U.S. special services' online surveillance activities. Snowden went to Moscow following this and has been in the transit area of Moscow's Sheremetyevo Airport since June 23. Snowden cannot fly out of Moscow because his U.S. passport has been revoked.