It is suspected that some deaths have occurred in the accident as well, an official said but could not immediately confirm the information.
Due to recent downpour, the oldest colossal tank had waters to its full capacity now for the first time and started developing minor breaches, officials said.
The victims, all relatives, belonged to Anantapuramu district and were on their way to Tirupati from Dharmavaram to attend a wedding engagement ceremony scheduled for Sunday morning.
A 25-year-old sailor died on vessel 'INS Kalinga' with Navy today claiming that the death was caused by a bullet injury sustained while handling firearms even as police suspected it to be a case of suicide.