New Delhi (CNN) -- A landmine explosion triggered by Maoist rebels killed five police officers in eastern India on Thursday, authorities said.
The assault was reported from the Dumka district of the mineral-rich Jharkhand state.
That eastern region went to polls Thursday as part of India's multi-phased general elections.
Insurgents had planted a landmine on the route that one of the security and election teams was to use to return to base after the voting closed, Jharkhand police spokesman Anurag Gupta told CNN.
"Five police personnel lost their lives in that attack," he said.
Five other people, one of them a policeman, were injured, Gupta said.