MOSCOW, July 27 (Xinhua) -- Three unidentified assailants have attacked a posse in Russia's southern city of Astrakhan Tuesday, killing one, reported the RIA Novosti news agency.
Another officer was severely wounded and has been taken to intensive care.
The assailants reportedly killed the 24-year-old officer with a knife and opened fire at his colleagues with his own gun.
An investigation was underway.
In 2009 some 410 law enforcement officers were murdered.
Last Saturday noon, two people were killed and 14 others injured by unidentified assailants in another southern Russian city of Samara at an open-air market.
Doku Umarov, the self-proclaimed amir of the turbulent Russian region of North Caucasus, posted a statement on the website for Islamic insurgency in March, vowing that his men will liberate not only Krasnodar Krai outside the federal district of North Caucasus, but also Astrakhan and the Volga region.