Russian opposition leader Alexei Navalny and five of his associates have been injured when a group of Cossacks attacked them outside an airport in southern Russia.

Navalny's spokeswoman Kira Yarmysh said Navalny and about 30 employees of his anti-corruption foundation were holding a team-building weekend in the countryside and arrived at the Anapa airport Tuesday morning when a group of Cossacks attacked them. Yarmysh said the Cossacks yelled: "Get out from our land!" before charging at the group, beating up men and women. She says one of Navalny's associates was hospitalized.

Attacks on political activists have become almost mundane in Russia lately with the activists facing physical threats and verbal abuse whenever they travel outside Moscow.