Pinarayi Vijayan had said that UAE had offered Rs 700 crore for Kerala flood relief.
The Kerala unit of the BJP on Friday said that the United Arab Emirates (UAE) did not announce financial aid of $100 million for the flood-ravaged state.
It demanded that Chief Minister Pinarayi Vijayan reveal the source who told him about the assistance.
Addressing the media in Kozhikode, state BJP chief P.S. Sreedharan Pillai said: "We want Vijayan to explain about this news and from where he received it. After the Centre expressed reservations in accepting the aid, a vicious smear campaign was unleashed against the Centre and Prime Minister Narendra Modi."
Earlier this week at a press meet in the state capital, Mr Vijayan spoke about the aid from the UAE, saying that the news was conveyed to him by Middle East business tycoon, MA Yusuf Ali.
The state BJP chief said PM Modi was committed to aid relief work in the state.
"He came and assessed the flood situation. Despite bad weather, he got in a helicopter and surveyed the destruction. Such is his commitment," he added.