Four CRPF personnel were among five persons injured in Maoist violence in Jharkhand's Bokaro district where polling is underway.
Targeting a CRPF patrol, Maoists triggered two landmine blasts at Lalpania near Jhumra hills, injuring three personnel and a civilian driver, CRPF (26th Battalion) Commandant Sanjay Kumar said.
The men were Pratap Singh, Surendra Kumar and PC Mandal while the driver was identified as Ranjit Kumar, Kumar said.
Maoists also fired on a CRPF patrol near Tulbul village in the area injuring a personnel in a brief encounter, the CRPF official said.
Maoists also blew up railway lines in Bokaro district disrupting train services.
A pressure cooker bomb was recovered near a polling booth in Maoist-hit Saranda forest, an hour before polling began in the Singhbhum (reserved) constituency, police siad.