A complaint has been lodged at Bidhannagar (North) police station. No one has been arrested yet.

Abhijit Guha, head of JCI’s finance unit, said the family was sleeping in one of the ground-floor rooms at the back of the house.

“We do not know when the miscreants broke in. In the morning, my wife saw a cat roaming inside the house. Even as we wondered how the animal had entered, we noticed that the front door was open. The almirah in one of the rooms had been ransacked,” Guha said.

The police suspect that the gang merely picked up the door keys, which the family kept atop a music system near one of the windows, and unlocked the main door to slip in.

“None of us heard any noise. One of the neighbours later told us that he had heard some dogs barking at midnight,” Guha said.

“We have been living here for the last 10 years but never felt insecure. Now, this township has become a very unsafe place to live in,” Guha said.