Moscow police are searching for suspects after prominent Russian politician Boris Nemtsov was shot to death near the Kremlin in what's being described as an ambush killing.

Details are still being gathered, but local sources reported that several shots were fired from a car, or from suspects who stepped out of a car, as Nemtsov was walking with a woman on a bridge Friday evening. In this video police are seen surrounding what appears to be a body bag with the Kremlin in the background. It's unclear if there were any other casualties.

Nemtsov was a former deputy prime minister of Russia under President Boris Yeltsin and a well-known politician during the 1990s and into the 2000s. More recently, Nemtsov led the RPR-PARNAS, theRepublican Party of Russia-People's Freedom Party. (Video via Deutsche Welle)

Nemtsov recently opposed Russian President Vladimir Putin and accused Putin and his friends of stealing $25 billion in money meant for the Sochi 2014 Winter Olympics preparations.

A spokesman for Putin said the Russian president condemned the killing, calling it a political provocation.

In Nemtsov's last tweet, he urged Russians to unite at an anti-war demonstration March 1. He was 55 years old.

This video includes images from Getty Images.