A 25-year-old man allegedly killed three members of a family over a petty quarrel in Maharashtra's Aurangabad city on Wednesday, the police said.
The incident took place in Choudhary Colony in Chikalthana area.
Amol Borde, the accused, allegedly had a heated argument with Bhagwan Borde (25) over a mobile phone around 8 pm, a police official said.
He allegedly attacked Bhagwan with a knife.
When Bhagwan's parents Dinkar Borde (55) and Kamlabai Borde (50) tried to intervene, Amol allegedly attacked them too.
"We have arrested Amol. He is being questioned," said police sub-inspector Taher Patel.