MOSCOW (AFP) - Gunmen Thursday killed at least seven Russian police officers in a shooting rampage in the turbulent North Caucasus region of Dagestan, news agencies quoted police as saying. Police chased the assailants, and blocked their vehicle, which ignited and exploded in the resultant shooting. Four gunmen were killed, RIA Novosti reported. The attackers had stolen a car in Dagestans capital Makhachkala before shooting police on duty in two locations in the city centre, killing six on the spot. Another later died of his wounds. According to our revised figures, the two attacks occurred on Thursday afternoon, resulting in the death of six traffic police officers, the RIA Novosti news agency quoted officials as saying. Three more policemen were admitted to hospital, one of whom died from his wounds on the operating table, Interfax reported.