The incident occurred late last night on the agri field of the family in Mamillapalli village.
According to police, the accused, identified as S Mallaiah, allegedly stabbed his father S Bhaskar (65) while the latter was asleep before smashing his head with a stone.
He separately attacked his brothers, S Srisailam (23) and S Ramaswamy (20) in a similar manner, one after another.
"The family owns around three acres of agriculture land and Mallaiah had been quarelling with his father, apparently seeking the entire land for himself," a Uppununthala police station official said.
The accused was picked up for questioning.
Police have registered a case of murder and further investigation is on.
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