A police man was seriously injured when Maoists exploded a landmine near a police outpost in Orissa's Rayagada district early Thursday.

Maoists set afire a police outpost at the Danga Sorada village, two houses of policemen and an ale house, locally known as Mada Bhati, where country liquor is served.

"When policemen reached the outpost, the booby trap left by the rebels in a leaflet exploded," District Superintendent of Police A.K. Singh told.

The injured jawan was admitted to Christian Medical Hospital at Bisamkataka where his condition was stated to be critical.

The Naxals put up banners and posters near the police outpost and also attacked a liquor godown, police said.