The death of Russian opposition politician and former Deputy PM Boris Nemtsov resembles a contract killing, Russian authorities believe.
This comes after Nemtsov was shot dead on Friday, shorly before midnight local time (20:40 GMT).
Russia's President Vladimir Putin is now personally in control of the investigation, according to his spokesman Dmitry Peskov.
Putin said the murder ?might be a provocation" and should be investigated immediately.
He extended his condolence to Nemtsov's family and relatives and condemned the killing.
As more and more details emerge as released by officials, it is reported that he was accompanied by a woman at the time of the incident.
He was in the center of Moscow, near the Kremlin.