A passerby was killed and three police wounded in a shooting attack on a police vehicle in the capital of the restive Russian region of Dagestan, authorities said today. The shooting took place last night in Makhachkala, when three men armed with assault rifles jumped out of a car that police had been following and opened fire, the republic's Interior Ministry said. According to the Associated Press, police had demanded the car stop for a documents check, but the driver initially refused, then stopped unexpectedly, the ministry said. A man standing nearby was killed and the assailants fled, the ministry said. -- SPA