The shootout left three of defendants dead and two of them injured.
Three gang members have been shot dead after grabbing guns from guards during a trial at Moscow Regional Court.More news: Jaume Collet-Serra To Direct Dwayne Johnson In Disney's 'Jungle Cruise'
The defendants are accused of being members of a group, dubbed in Russian media the Grand Theft Auto Gang after the computer game. Three were killed and the other two were disarmed and detained. RIA Novosti lawyer Sofya Rubasskaya said she heard at least 20 shots fired.
Five of the accused "attacked police officers (escorting them) and tried to seize their weapons", while in an elevator, police said.
The incident took place before a hearing in the case of a gang of nine people suspected of killing more than a dozen motorists while terrorising Moscow's roads for months in 2014. "Later somebody said that an armed guard had been injured".More news: Pete Rose accused of having sex with underage girl
After the shoot-out, everyone in the court was evacuated and all hearings have been postponed, the lawyer said.
The investigation into the gang charged a total of nine defendants, all of whom originated from ex-Soviet Central Asian states, with murder, "banditry", robbery and arms trafficking.
The GTA Gang were said to have been given the name following charges relating to the murder of vehicle drivers in Moscow and other areas in 2012 to 2014.More news: Jaguars left tackle Branden Albert announces retirement
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