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Prosecutor Ihor Nimchenko told journalists that the operational units had tipped the military prosecutor's office that a convoy vehicle, which is to bring  Yerofeyev and Aleksandrov to court, might be attacked, therefore it was dangerous to transport them to the courtroom as usual.

He refused to disclose any details. "If the defendants refuse to participate in court hearing by video conference, special security measures will be taken when transporting Aleksandrov and Yerofeyev," he said.

Another prosecutor Oleksandr Klymovych said that, if necessary, or at the request of the court, the prosecutors would be ready to provide evidence that an attack on the convoy was being plotted.

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Read alsoAnother witness says Yerofeyev, Alexandrov claimed being Russian troops when detainedIn turn, Yerofeyev's lawyer Oksana Sokolovska said that she did not believe in the version of assassination attempt. She considers this situation an attempt to remove her from the proceedings.

UNIAN memo. Two Russian GRU officers Aleksandrov and Yerofeyev were captured by Ukrainian troops near the town of Schastia in Luhansk region on May 16. They were wounded in a shootout. Ukrainian soldier Vadym Puhachov was killed in a fight with them.

On May 18, the then SBU Chairman Valentyn Nalyvaichenko said that the Russian military would be put on trial under Article 258 of the Criminal Code of Ukraine for their participation in a terrorist organization.

Read alsoRussia agrees to swap Sentsov, Kolchenko for captured Russian GRU officersOn May 22, Kyiv's Shevchenko District Court ordered that Russian citizens Aleksandrov and Yerofeyev be kept in custody until the investigation is under way.

On July 29, they were transferred from hospital to a pre-trial detention center.

On August 26, Chief Military Prosecutor of Ukraine Anatoliy Matios said that an investigation into the case of Aleksandrov and Yerofeyev was over, and the indictment against them might be sent to court within 10 days.

On December 23, 2015, the court extended the detention period for Aleksandrov and Yerofeyev until February 20, 2016.

On February 10, 2016, Kyiv's Holosiivskiy District Court ruled to extend the arrest of two Russian GRU officers Aleksandr Aleksandrov and Yevgeniy Yerofeyev for another 60 days – until April 9.