 Media playback is unsupported on your device Media caption The BBC's Sarah Rainsford says people came in their thousands to say farewell 
 
 Thousands of Russians have bid farewell to murdered Russian opposition politician Boris Nemtsov as his funeral took place in the capital Moscow. MOSCOW, March 3 (UPI) -- Russia has banned an opposition leader and several European politicians from attending the funeral of slain politician Boris Nemtsov. No arrests have been made and no motive has been established for the crime. Nemtsov's final resting place is at Troyekurovskoye Cemetery, where murdered journalist Anna Politkovskaya was buried in 2006. Aides to Putin deny any involvement in killing Nemtsov, who was shot in the back four times on Friday within sight of the Kremlin walls. A video of the apparent getaway vehicle used by the suspects in the Nemtsov murder has been released by LifeNews. But at the ceremony there was a show of solidarity for Nemtsov from several prominent figures who served with him under former President Boris Yeltsin and who still have influence within the business and political elite. Nemtsov killing polarises society 
 
 Profile: Boris Nemtsov 
 
 So many people came to see Nemtsov's coffin that when the viewing at the Sakharov human rights centre ended after its scheduled four hours, hundreds of people were still queuing outside. Latvian member of the European Parliament Sandra Kalniete was denied entry into Russia at a Moscow airport. Borusewicz was to lead the Polish delegation at the funeral but instead he addressed the audience through a letter read out by deputy foreign minister Konrad Pawlik. Russia said he was on a list of Polish officials barred from travelling to Russia, drawn up after the EU imposed sanctions on Russia over its involvement in Ukraine. Russian investigators say they are actively working to track down Nemtsov's killers.
– Mourners have gathered at a human rights center to remember slain Vladimir Putin critic Boris Nemtsov—but many haven't been welcome at the event, the BBC reports. Opposition leader Alexei Navalny, held for 15 days after promoting a demonstration, hasn't been allowed out of jail, while Poland's senate speaker and a Latvian official weren't allowed to enter the country. The Latvian official, a member of the European parliament, says she was stopped at the airport for two hours and ultimately turned away. "I was not coming to Russia to make political declarations and standing on the corner to offend the people," she tells UPI. The Polish official, Bogdan Borusewicz, couldn't obtain a visa amid the conflict in Ukraine: Following EU sanctions against Russia, Borusewicz's name was on a list of Polish leaders who couldn't enter, according to Russia. Putin himself didn't attend the ceremony, the BBC notes, but the deputy prime minister did. Thousands arrived for the event, with the line of mourners reaching about a mile long, Reuters reports. Among them was Boris Yeltsin's widow, Naina Yeltsina, Another government opponent spoke: "The shots were fired not only at Nemtsov but at all of us, at democracy in Russia." Added a mourner: "He was our hope … I feel like Putin killed me on the day he died."