They said the prime minister should take action based on evidence if there was any "seriousness" in his allegations, and not raise the same in Gujarat poll campaign.
"He is dragging Pakistan into a domestic poll...if he is serious, he should have taken up the issue with the Congress. As the head of the government, he could have taken appropriate action. Instead of that, he is making it a poll issue. I think it is not proper in democracy," senior CPI leader D Raja said.
"Will the prime minister of the country act?" he asked.
JD(U) leader Pavan Varma said Modi should be talking about governance in Gujarat than such issues.
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Addressing an election rally in Palanpur in Gujarat yesterday, Modi suggested that Pakistan was trying to influence the assembly polls in the state.
He claimed that some Pakistani officials and Manmohan Singh met at Congress leader Mani Shankar Aiyar's house on December 6 to discuss the matter.
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