A road bridge was blown up by the Maoists in Ghatshila sub-division of East Singhbhum district on Sunday night.
Ghatshila SDPO Anup Birtheray said the ultras blew up the bridge connecting Musaboni and Dumaria by exploding a landmine.
The incident occurred ahead of the 48-hour bandh in seven States called by CPI(Maoist) to protest against the Operation Green Hunt.
The 48-hour bandh has been called from March 22 in Bihar, Jharkhand, Orissa, West Bengal, Chhattisgarh, Andhra Pradesh and three districts of Maharashtra.
