Six police personnel and a civilian were killed and one policeman went missing when Maoists blew up their vehicle in Jharkhand's Gumla District today. The Maoists ambushed a truck, in which the policemen were on patrol, by triggering a blast near Gurdari mines when the vehicle was returning to Bishunpur police station.<br/><br/>Inspector General of Police V D Desmukh said in Ranchi that Assistant Sub-inspector Shaym Kumar Sinha and the truck driver were among those killed. The others included havildars and constables, he said.<br/>