Investigators work on a scene of an explosion outside the main market in the southern Russian city of Vladikavkaz, November 6, 2008. REUTERS/StringerFrom Reuters:
ST PETERSBURG, Russia (Reuters) - Russia faces a lingering terrorist threat and cannot drop its guard, President Dmitry Medvedev said on Friday, a day after a suspected suicide bombing killed 12 people.
Security officials said they suspected a woman had blown herself up in Thursday's blast at a bus stop in Vladikavkaz, a city in Russia's North Caucasus region where Moscow has been struggling to contain a wave of violence.
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