Seven security personnel, including a Central Reserve Police Force assistant commandant and a police assistant sub-inspector, were killed on Tuesday in landmine blasts triggered by Maoists in Bastar region, police said.

"Seven policemen were killed and some others were injured when Maoists triggered directional mines on a police party," Bastar range Inspector General of Police R K Vij told PTI by phone.

The incident occurred at 1700 hours when a police party of 30 jawans and officers were on a combing operation on motor-cycles and on foot in Jharghati jungle, about 23 km from the district headquarters and 350 km from the state capital, Vij said.

Among the killed were the CRPF Assistant Commandant Vikas Chandra and constable J N Chetia of 43 batallion of the central force, CRPF sources said.

Vij said besides the Assistant Sub-Inspector of the Chhote Dongar police station, two jawans from the Chhattisgarh Armed Force and an equal number of policemen from the Narayanpur district force were killed in the mines blasts.

At least five policemen were also injured in the blasts, sources from Baster said.

"Besides injuring five policemen, the Naxalites also looted the weapons of the killed security personnel," the sources said.