Chaibasa : A CRPF sub-inspector was injured after he accidentally stepped on an iron spike planted by proscribed CPI (Maoists) during an anti-naxal operation in a forest between Haathiburu and Limsadih villages in Jharkhand’s West Singhbhum district on Thursday, a senior police officer said.The condition of the injured sub-inspector is stable, SP Ashutosh Shekhar said on Friday.During the operation, security forces comprising CRPF, Cobra and Jharkhand Jaguar personnel found 218 spikes planted on roads between Rabhahatu and Boipaisasang villages under Goilkera police station limits in the district, the SP said.