The victim's body was found with head injury and a blood-stained stone was recovered from near his body, they said.
A case has been registered against unidentified persons and investigations are on, they said, adding that they are also looking at murder angle in the case, they said.
In a separate incident, body of a person was found hanging from a tree in Ramgarh area today, police said.
Shan Lal had left his home in the wee hours of the day, they said.