The mother of the Boston bombing suspects has been pretty vocal about defending her sons and denying they were involved in terrorism.
According to Russian officials, Zubeidat Tsarnaev and Tamerlan Tsarnaev were caught on tape vaguely discussing jihad back in 2011.
The secret recordings were sent to the FBI, according to Russian officials, along with their concerns that the Tsarnaevs were religious extremists. FBI officials said that they looked into it, but without additional information the case was closed.
140 people suspected of being Islamic extremists were detained in Russia on Friday, after the Federal Security Service and local police raided a place of worship in southern Moscow.
The mosque, according to sources, is allegedly a place that is visited by people who are involved in planning or carrying out terrorist attacks.
It is unclear if the raid is connected to the Boston bombing investigation.