Roadside bombs and gunfire killed six people and wounded five in Russia's North Caucasus region, officials said, as a provincial leader remained in critical condition from an earlier suicide attack.
The president of the province of Ingushetia, Yunus Bek Yevkurov, has been kept on a respirator in a Moscow clinic since he was wounded Monday, but his life was not in immediate danger, said his spokesman.
Chechnya's branch of the Russian Interior Ministry said a roadside bomb destroyed a car late Tuesday and killed two civilians.
Early Wednesday, five police officers were wounded by a bomb hidden amid roadside garbage, it said.
In Ingushetia, a police officer was shot to death Wednesday by unidentified assailants, the local prosecutor's office said. In a separate clash, several gunmen riding in a vehicle opened fire at police officers who tried to check their identity papers. Police killed all three militants, the regional Interior Ministry's branch said.