U2singerBonopaid tribute Saturday night to recently deceased Russian opposition leaderAlexei Navalnyduring his concert atThe Spherein Las Vegas.

His remarks on Navalny start at the 2:35 mark in the video above.

To these people, freedom is not just a word in a song.

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And its so important that Alexei Navalny chose to give his up.

So I thought tonight, the people who believe in freedom must say his name.

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Bono has demonstrated his support for Russian opposition before.

The subway stations have frequently been used as bomb shelters in the city.

We pray that you will enjoy some of that peace soon.

The U2 performers were joined by Ukrainian singer Taras Topolya from the Ukrainian band Antytila and other local musicians.