Kerala Chief Minister Pinarayi Vijayan on Monday said the huge participation of people in the INDIA bloc rally held in New Delhi a day ago was a strong warning for the BJP. Addressing the media here, Vijayan also attacked the Congress party and said it was the steps taken by the grand old party which led the Enforcement Directorate to probe the Delhi liquor excise policy case. AAP chief and Delhi Chief Minister Arvind Kejriwal was arrested recently by the ED in the liquor policy case. Aam Aadmi Party is part of the INDI Alliance. "The huge participation of people in the INDIA bloc rally held in Delhi on Sunday gives a strong warning for the BJP," Vijayan said. A day after 18 anti-BJP parties came together in New Delhi to protest against the arrest of Kejriwal, he said that the Congress should also learn a lesson from the rally. The grand old party should introspect on their stand when it comes to attacking non-Congress parties across the country, he said. "Steps taken by Congres