Naveen, a driver by profession, found his wife Ezhin missing along with two daughters-- four and half year and one and half year old--when he woke up this morning, police said.
As the search for them in the neighbourhood remained futile, he noticed the door of the sump was opened and on peeping found the bodies of wife and children floating, they said.
As he raised alarm, neighbours rushed to the spot and informed police, who retrieved the bodies form the sump, they said.