MOSCOW, June 5 (RAPSI) - Mayor of Makhachkala, Dagestan Said Amirov, who is accused of having ordered the killing of a police investigator in 2011, has appealed a decision by Moscow's Basmanny District Court to detain him, his attorney Mark Kruter told RAPSI on Wednesday.

The court spokesman, however, has said that the appeal has not yet been registered with the court.

Amirov has been the mayor of Makhachkala, the capital of the southern Russian region of Dagestan, since 1998. He was arrested on June 1 and transported to Moscow, where he was taken into custody on suspicion of ordering the murder of investigator Arsen Gadzhibekov. Amirov denies the charges.

On Tuesday, murder charges were officially brought against him.

The investigators believe that Amirov ordered the assassination, which was organized by Magomed Abdulgalimov, assistant city prosecutor of Kizlyar with accomplices, Deputy Mayor of Kaspiysk Yusup Dzhaparov and Kirovsky District police investigator Magomed Akhmedov. The murder was committed by Magomed Kadiyev, the Investigative Committee said.

The authorities have arrested 11 people in connection with this case and do not rule out that more suspects may be involved.

Amirov, a long-serving member of the ruling United Russia party, won the title of Russia’s best mayor at a contest in late April.

Gadzhibekov, chief of the investigation department in Makhachkala's Sovetsky District, was shot dead near his home as he was getting out of his car. He had worked on a number of crimes, including the 2010 terror attack in Kizlyar that killed 10 and injured 270.