Russia on Friday claimed a major breakthrough in the twin suicide attacks at Moscow metro stations where 40 people were killed, saying it has arrested the main plotters of the terror bombings.
"We have made arrests. Very serious work is underway," a law enforcement source was quoted as saying by Russian Information Agency Novosti. However, no other details were disclosed.
Earlier, investigators had identified the suicide bombers as Dzhanat Abdurakhmanova (Abdulayeva), 17, and Mariyam Sharipova, 28, both residents of Russia's North Caucasus republic of Dagestan. 40 people were killed and over 100 injured in the blasts.
Abdurakhmanova was the widow of Dagestani militant Umalat Magomedov (Al-Bar), who was killed during a special law enforcement operation on December 31, 2009 after he shot at police who were trying to search a car he was travelling in.
Sharipova was a school teacher and wife of militant leader, Magomedali Vagapov.
In the course of investigation, the Moscow police found an apartment, rented to suspected male accomplices of the bombers, who are believed to have accompanied the two women to the metro and given them explosive belts.
Currently security forces are reported to be carrying out operations in Dagestan against Vagpov's militant gangs.