They also burnt down some lorries and other vehicles at a sand ramp (where sand is accumulated) at Bhupatiraopet village of the district last night, they said.
These attacks were carried out by Maoists who entered into Telangana from Chhattisgarh after crossing the Godavari river, police said.
The Naxals stabbed to death a man after branding him a "police informer", they said.
In another incident, they fired at a man, suspecting him to be a police informer, at Sundarayya Nagar. The man suffered a bullet injury in the right hand, they said.
The rebels later went back to Chhattisgarh, they added.