A suicide bomber blew up his car at a police checkpoint in Russia’s North Caucasus region on Tuesday, killing a policeman and severely wounding three others.
The checkpoint on the internal border between the provinces of North Ossetia and Ingushetia was totally destroyed.
Moscow has been struggling with an Islamist insurgency which began during its two devastating wars against separatists from 1994 to 2000 in Chechnya, and the region is plagued by near daily violence.
Last week President Vladimir Putin told security forces they must ensure the safety of major events in Russia, including the upcoming 2014 Winter Olympics to be held in nearby Sochi.
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