Two men have been detained over the murder of Russian opposition politician Boris Nemtsov, the head of the Federal Security Service (FSB) has announced.
Anzor Gubashev and Zaur Dadayev, both from the Caucasus region, were detained on Saturday, FSB director Alexander Bortnikov said.
Russian investigators said they were suspected of organising and carrying out the murder.
The killing on a bridge within sight of the Kremlin shocked Russia.
The former deputy prime minister and veteran liberal politician, 55, was shot in the back four times on the night of 27 February as he was walking on the street with his girlfriend. He was buried in Moscow on Tuesday.
Mr Bortnikov gave no details of how and where the suspects were detained, in the brief statement carried by Russia's state-owned Channel One, but he did say the investigation was continuing.
Neither of the men has yet been formally charged.
 

AZERTAC