2002 ambush attack in Russia
The 2002 Grozny OMON ambush occurred on April 18, 2002, when Chechen insurgents killed about 8 and wounded two republican OMON special police officers.
The ambush occurred just 90 meters from Chechnya's main police headquarters. The first bus in a convoy hit a remote controlled mine, and the militants then opened fire on the line of vehicles from the ruins of a nearby high-rise building. 
Another version of the attack was presented by "Nezavisimaya Gazeta", which claimed there were two connected attacks.
The incident preceded by two hours President Vladimir Putin's mid-term state-of-the-nation address, in which he said the "military phase" of the Chechen conflict had been completed.
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