Maoist ultras blasted an additional health centre and a training centre at Pangalwa village under Darhara police station in Bihar's Munger district in the wee hours on Saturday, Superintendent of Police Sridhar Mandal said.

Over 50-60 ultras surrounded the two buildings housing the additional health sub-centre and the training centre for blanket and carpet industries and used dynamites to blow them up.

A combing operation has been launched to arrest the ultras, Mandal added.