MOSCOW, May 12 - RAPSI. The Moscow City Court has resolved not to request the psycholinguistic appraisal of the Pussy Riot case concerning the three female punk rockers charged with hooliganism, the court told the Russian Legal Information Agency (RAPSI/

Sources say the court holds that at this stage only investigators are able to assess this expert opinion.

The defense stated that they learnt of the psycholinguistic research undertaken as part of the investigation only after the arrest extension. The defense believe the results disprove the charges, however the judges have refused to request this analysis from the investigators.

On Friday, the court upheld the arrest extension for the alleged Pussy Riot members: Maria Alyokhina, Yekaterina Samutsevich and Nadezhda Tolokonnikova. The three will remain in custody until June 24.

On February 21, five masked punk-group members performed a protest song called "Holy Sh*t" at the altar of the Christ the Saviour Cathedral.

The song included lyrics such as "Holy Mother, Blessed Virgin, chase Putin out!" The punks said the performance was a reaction to Orthodox Church head Patriarch Kirill's backing of President Vladimir Putin in the March 4 election. The patriarch called Putin's 12 years in power a "miracle of God" in a televised meeting. The Pussy Riot performance video was posted on the Internet and caused a public uproar.