The Kerala government was continuing to prevent free movement of construction materials required to fill up holes in the Mullaperiyar dam, said Marumalarchi Dravida Munnetra Kazhagam (MDMK) general secretary Vaiko here on Thursday.

Be it a water dispute or an environmental issue that affected people of Tamil Nadu, the MDMK stood in the forefront and turned it into a people's movement, he said.