Protests coincide with Putin's 60th birthday celebrations

At least six protesters were arrested in Moscow Sunday in demonstrations that marked Russian President Vladimir Putin's 60th birthday.

Around two hundred protesters were calling for answers in the death of journalist Anna Politkovskaya.

Politkovskaya is known for vocally criticizing Putin's policies in Chechnya. She was shot in her apartment building in 2006.

According to Al-Jazeera, Putin was away from the protests, celebrating his birthday with family in St. Petersburg.

The protests come as Russian investigators look in to a documentary film alleging a potential overthrow of Putin's government.

The documentary claimed there were plans for a mass riot and that an opposition protest leader would receive foreign help in the overthrow.