Kochi: A man hacked a family of four at Kadayirippu in Kolenchery here over an argument on Sunday.
According to police, the accused Anoop used a knife to attack his neighbours Peter, his wife Sally, his daughter Roshni and son-in-law Basil.
The incident happened around 3 pm. A preliminary probe suggests that a dispute over honking led to the crime.
All four are grievously injured and are undergoing treatment at Kolenchery Medical College Hospital.
Anoop was arrested by Puthencruz police.
