Six policemen were killed late on Friday night as armed Maoists triggered a landmine blast blowing up a jeep on patrol in Bihar's Sheohar district two days before the second phase of assembly polls.

"The ultras detonated a landmine blast targeting a police patrol passing over a small culvert at Jhitkahi in which six policemen, including the SHO of Shyampur Bhatha police station Pravin Kumar Singh, were killed," Director General of Police Neelmani told PTI.

"Among those killed are four Special Auxiliary Police (SAP) personnel and the driver of the jeep," he said. Another SAP jawan injured in the landmine blast was rushed to a nearby hospital, where he succumbed.

The site of the blast was 35km from Seohar town.