His remarks came a day after the CPI(M)-led LDF government in Kerala favouring construction of a new dam in place of the existing Mullaperiyar reservoir.
Karunanidhi recalled that Vijayan had earlier said that his government did not believe in the previous Congress-UDF dispensation's stand of a new dam in place of the existing structure and that he batted for talks with Tamil Nadu to amicably settle the interstate row.
Vijayan's latest statement was "contradictory" to what he had stated earlier even as a central team had recently vouched for the strength of the dam, Karunanidhi said.
Vijayan's statement in the Assembly amounted to creating "unnecessary problems", the DMK leader added.
In reply to an 'unstarred question' in the assembly, Vijayan had said the new government's policy was also for construction of new dam by examining the legal and technical feasibility.
Kerala and Tamil Nadu have for long been at loggerheads over raising the water level of the dam.
The dam is situated in Thekkady district in Kerala and is owned and operated by Tamil Nadu government.
