Cemal Karaata of Fetullah Terrorist Organisation is reported to be in Canada with his family, having fled there after the 2016 assassination of Russian ambassador Andrey Karlov in Ankara.
A Turkish court also ordered separate trials for nine fugitive suspects, including FETO ringleader Fetullah Gulen, over the 2016 assassination of Andrey Karlov in Ankara.
Russia’s former ambassador to Turkey, Andrey Karlov was shot to death by off-duty police officer Mevlut Mert Altintas in Ankara on December 19, 2016.
Mirgayas Shirinskiy, 62, was found dead in the swimming pool at his home in the Sudanese capital. He was the fourth Russian envoy to die on the job in the past eight months.
New Russian ambassador to Turkey, Alexei Yerkhov, emphasized the momentum gained between Ankara and Moscow and described bilateral ties as "promising."
Friday's high-level meeting between Turkish, Russian presidents will contribute to deeper cooperation between the two countries.
Murdered Russian diplomat Andrey Karlov was posthumously awarded the title "Hero of the Russian Federation" by President Vladimir Putin.
The relatives of Mehmet Mert Altintas, who gunned down Russia's ambassador to Turkey Andrey Karlov, were released after being questioned by authorities.
Thirteen people have now been detained and are being questioned by a Turkish-Russian joint taskforce investigating Andrey Karlov's murder.
Andrey Karlov is remembered as bringing Ankara and Moscow closer after a particularly bleak period in 2015.
A gunman fired his weapon into the air near the US embassy in Ankara on Monday, hours after Russia's ambassador was shot dead at a nearby art gallery in the Turkish capital.
The family of the assassin and his roommate were detained for questioning as investigators are looking for possible links to the Fethullah Gulen Terrorist Organisation.
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