A school teacher and her 14-year-old son were found murdered in their flat in Kolkata on Monday.
Their bodies were discovered by her husband when he returned from work. The husband found the door ajar with the bodies of the woman and the son in two different rooms.
The victims were likely hacked to death with a kitchen chopper by more than one attacker, according to the police. However, the post-mortem reports are awaited.
The husband and the tutor of the 14-year-old boy are being questioned. The tutor had come to their house at 5pm but left after no one answered the door, the police said.