The Bharatiya Janata Party (BJP) on Saturday wrote to Karnataka Police to register a defamation case against state's Urban Development Minister Haj R Roshan Baig for using foul language against Prime Minister Narendra Modi.

BJP's Bengaluru unit on Saturday wrote to police and requested to register defamation case against Baig and demanded to punish him for the same.

A viral video purportedly shows Baig using unprintable language in Tamil while hitting out at Prime Minister Modi for banning the Rs 1,000 and Rs 500 denomination notes late last year.

He was addressing the Tamil-speaking people of Pulakeshi Nagar in his Shivajinagar Constituency.