Four CRPF personnel were today injured in a series of IED blasts carried out by Naxals in Dhanbad district of Jharkhand. Officials said the incident occurred near Topchanchi-Jitpur axis when bike-borne troops of the force were out on patrol in the Left Wing Extremism affected areas of the district. "Four troops have been injured after a series of IED blasts occurred in the area. The team was led by a senior officer in the rank of Second-in-command.The injuries are not critical," they said. CRPF troops belonging to the 154th battalion, along with those from state police, were out for a Long Range Patrol when they encountered a series of IED blasts around 1215 PM. Reinforcements have reached the spot and the injured are being evacuated to a nearby hospital, they said. Jharkhand DGP D K Pandey and senior officials are reaching the spot, they added. Few days back, seven CRPF men were killed in a deadly landmine blast executed by Maoists in Dantewada district of Chhattiagarh.