The Goa government has asked state police to remain vigilant against exhibition of video cassettes showing the Gujarat riots after police swooped down on a group holding a meeting on Tuesday in Velim constituency in south Goa and seized one such cassette, officials said today.While the 50 persons present at the meeting were allowed to disperse, the cassette and the video player were seized. One person was questioned by police for allegedly organising the screening. However, he has not been arrested so far, Goa DIG Karnal Singh said.‘‘By showing this cassette do they want to incite communal passions in Goa?” Singh asked. He, however, did not reveal the contents of the cassette.The Congress has strongly denied that it had any role to play in the exhibition of the cassettes. ‘‘We have not distributed this cassette,’’ former chief minister Luizinho Faleiro said.AICC general secretary Ramesh Chennithala said that some NGOs protesting against the violence in Gujarat could be behind the incidents. ‘‘(But) we don’t have to go around showing cassettes as everyone in Goa knows what is happening in Gujarat,’’ he said.Chief Minister Manohar Parrikar of the BJP had earlier warned that exhibition of any propaganda material pertaining to Gujarat would invite punishment under Section 153 of the Representation of People’s Act.