Preliminary information coming to the base headquarters here said close to seven Improvised Explosive Device (IED) blasts were carried out in Dolkata area of the district when troops were out for the search operation.
"Four security personnel of the state police and eight of the paramilitary CRPF have been injured. The forces are now trying to send reinforcements," a senior official said.
The team that came under the attack comprise a joint squad of state polices' Jaguar team and the Central Reserve Police Force (CRPF).
Four persons were travelling in a car when the rebels intercepted their vehicle on Saturday evening near Navkania village situated in the foothills of Parasnath of this district and abducted them.