At least 11 people died on Sunday when a tourist boat capsized in the southern Indian state of Andhra Pradesh, officials said.
The administration was investigating what exactly caused the incident, but the initial probe found that the private boat operator did not have the necessary permission to ferry people, Lakshmikantham said.
Alerted government immediately pressed disaster management forces in to service to rescue people struck in the water.
So far five bodies have been recovered.
The deputy chief minister rushed to the accident spot to oversee the rescue operations and has directed police to rush additional force to help locate the missing persons.
Police said the ferry riders were not wearing life jackets, The Press Trust of India news agency reported.
The boat was proceeding from Bhavani Islands to Pavithra Sanghamam on Sunday evening.
The boat's carrying capacity is 24 people. The panic-stricken passengers tried to rush to one side, but the inexperienced driver failed to control and the boat overturned.
NDRF top official Love Kumar and others also supervised the search operation.