Right before the meeting of the IT parliamentary committee headed by Congress MP Shashi Tharoor on the Facebook controversy, IT minister Ravi Shankar Prasad wrote a letter to Facebook chairman Mark Zuckerberg on Tuesday evening accusing the social media platform of being biased against the right-leaning individuals and groups. IT minister also said that it's problematic when top officials of Facebook India use abusive words for PM Modi and senior ministers. Prasad has written this letter at a time when Facebook India is facing allegations of colluding with the ruling party BJP.