Khunti, March 25 (ANI): At least three policemen were seriously injured in a landmine blast triggered by Naxals in Jhankhand's Khunti district on Tuesday. The blast took place near the Murhu police station in the Kotna village where the officers were engaged in anti-Maoist operations. Superintendent of police, Anees Gupta, threw more light on the incident. For better treatment, they have now been sent to Apollo hospital in Ranchi. Gupta also said they are inspecting the site of the blast. Operations and raids against the Maoists have been taking place in the area.