Russian authorities arrested two men Saturday in the murder of opposition leader Boris Nemtsov, Russian media reported.

Russian authorities arrested two men Saturday in the murder of opposition leader Boris Nemtsov, Russian media reported.

President Vladimir Putin has been informed of the arrests, Russia Today quoted According to FSB chief Aleksandr Bortnikov as saying.

Bortnikov said the suspects were identified as Anzor Gubashev and Zaur Dadayev, adding that both of them come from Russia’s southern region of the North Caucasus, a restive place with insurgency and crime problems.

The investigation into the crime is ongoing, he added, speaking to Russian media.

Nemstov, a former Russian governor and deputy prime minister, who became a prominent opposition figure in the early 2000s, was gunned down in central Moscow on February 27. The assassination triggered worldwide condemnation and calls for swift investigation.

The politician was killed on a bridge over the Moscow River near the Kremlin as he was returning home with a female companion. The shooter hit Nemtsov in the back four times and fled in a getaway car.

The crime is being investigated by a joint task force, which includes the police, the FSB and the Investigative Committee.

The prime witness to the crime, Ukrainian model, Anna Duritskaya, who was accompanying Nemtsov, has since returned to Kiev. She told the media she was unable to identify the killer.

The killing happened two days ahead of an opposition rally Nemtsov helped organize. The rally was replaced with a mourning march in central Moscow, which drew tens of thousands of people.