The Centre on Thursday categorically cautioned social media platforms against spreading fake news or anything inciting violence, as Information Technology Minister Ravi Shankar Prasad said action will be taken if Indian laws were flouted.

"There is freedom of speech but Article 19A says that this is subject to reasonable restrictions," the Minister for Communications, Electronics & Information Technology told in the Rajya Sabha as he reminded platforms like Twitter and Facebook to comply with Indian rules while carrying out business.