This is the third major incident when a boat capsized while carrying tourists through a deep reservoir.
On July 27, 2002, 29 tourists drowned in the Vembanad lake between Muhamma and Kumarakom.
In February 2007, 15 school children and two teachers drowned when their boat capsized at the Thattekkad bird sanctuary.
Enquiry into Kumarakom and Thattekkad tragedies found serious safety lapses. Though the enquiry commissions had recommended the appointment of a safety commissioner for inspection of boats, the government have been sitting on it and nothing has been done so far.