Russian opposition marches in tribute to Nemtsov

Thousands of people gathered in central Moscow Sunday for a march to mourn murdered opposition leader Boris Nemtsov.

Russian authorities, usually slow to give permission for large opposition rallies, gave quick approval for Sunday’s memorial march.

Nemtsov, 55, was to have led an anti-war and anti-Putin rally in Moscow. Instead, as many as 50,000 people are expected to come out to pay tribute to the man whom U.S. President Barack Obama called a “tireless advocate” for the rights of the Russian people.

Police are hunting for those responsible for shooting Nemtsov four times from a car while he and a female companion crossed a bridge over the Moscow River Friday night, just steps from the Kremlin. The woman was not hurt.

People have continued to leave flowers at the site where Nemtsov was killed.