MOSCOW, January 23 - RAPSI. The Supreme Court's Judicial Panel for Criminal Affairs has upheld the prison sentence of Ilyas Saidov on Wednesday, who was convicted of planning an explosion on Moscow's Red Square.

Saidov was sentenced to 15 years in a top security prison.

The panel rejected his appeal that the sentence was too harsh. In his appeal, Saidov noted that this was his first conviction and he has repented.

Also Saidov entered into a plea bargain before the start of trial, disclosing valuable information about key members of a Dagestani terrorist group, including Ibrahimkhalil Daudov, who was later killed in a counterterrorist raid in Dagestan.

He also informed investigators of previously undisclosed terrorist attacks and the places where arms were stored and on the murders of top Dagestani officials.

Saidov entered into the agreement in hope of receiving a lenient sentence. Prosecutors told the Russian Legal Information Agency (RAPSI/ earlier that Saidov had been charged on 18 counts for taking part in the attempted attack under five Criminal Code articles on terrorism, murder, attempted murder of law enforcement officials, illegal arms sales, and banditry.

The Moscow City Court convicted two other individuals in the case, Timur Akubekov and Zeinap Suyunova.

Lawsuits against other individuals named in the case – gang members Islam Babayev, Shamil Baimambetov, Khairulla Magomedov, Artur Magomedov, Nazir Magomedov, and Ravil Nasyrov – have been filed with the Dagestani Supreme Court.

The terrorist act was planned for New Year's Eve 2010.

Investigators say Suyunova, a member of the terrorist group, traveled to Moscow with Zavzhat Daudova, another would-be suicide bomber, and checked into a hotel on December 28, 2010.

One bomb mistakenly detonated in the hotel, killing one terrorist. Suyunova quickly left Moscow, but was later detained.

Investigators have stated that Saidov was tasked with monitoring the transport of the explosive devices. However, his role was minor, as he did not actually touch the explosives when they were loaded in Dagestan or unloaded in Moscow.