The Election Commission has cautioned RJD chief Lalu Prasad for his reported castiest remarks which it said were violative of the model code and asked him to be "more careful" in public utterances during election campaigns in future. "...the Commission has considered your reply carefully and has observed that you have not denied having made the impugned statements...the explanations furnished by you in support of justifying those statements have not been found convincing by the Commission," the Election Commission said in its order.