Eleven policemen were killed and at least 30 injured when suspected Maoists ambushed a police team in Lohardaga district of Jharkhand today. IGP (Operation) R K Malik said in Ranchi that, the rebels triggered several land mines to ambush the security personnel at Dhardhariya prompting the CRPF and district police personnel, returning from Urumuru village, to open fire. He said, eleven policemen were killed in the ambush as thick smoke engulfed the area with the gunfight continuing for some time. He said, the rebels left the spot after the gunfight. The Police said, at least 30 security personnel, comprising both CRPF and district police, were injured and taken to local health centre. The security personnel had gone to Urumuru after a tip off about Maoists having assembled there, but were returning after not finding any one, when they were ambushed by the ultras. .