MOSCOW, April 27 - RAPSI. Nadezhda Tolokonnikova and Maria Alyokhina, arrested for their "punk prayer" performed in Moscow's Christ the Saviour Cathedral, have sent a letter to President Dmitry Medevedev claiming breach of the Constitution in their case, attorney Nikolai Polozov told the Russian Legal Information agency (RAPSI/ on Friday.

The lawyer added that he was disappointed with the statements Medvedev made in regard to the Pussy Riot case in an interview to five Russian TV channels on the previous day.

Medvedev stated that he did not have the right to intervene in the matter.

"Nevertheless, he has got the power to instruct the prosecutor's office to look into the case, which he has not done. Regretfully he has not made this honorable and non-binding gesture before he leaves office," concluded Polozov.

On February 21, five masked members of Pussy Riot punk-group performed a protest song named "Holy Sh*t" at the cathedral's altar. The song contained lyrics such as "Holy Mother, Blessed Virgin, chase Putin out!" Pussy Riot allege the performance was a response to Orthodox Church head Patriarch Kirill's backing of President-elect Vladimir Putin in the run-up to his March 4 election landslide. The patriarch called the 12 years of Putin's rule a "miracle of God" in a televised meeting.