Metropolitan Magistrate Neeraj Gaur directed the police to file an Action Taken Report(ATR) by September 22.
"ATR be called from SHO of concerned police station (Subzi Mandi)," the court said.
The order of the court came on a complaint filed by advocate Prem Shankar Sharma who said Thackeray's remarks, also allegedly threatening Bihar natives to be thrown out of Maharashtra, are provocative and anti-national, for which an FIR must be lodged against him.
"Thackeray's August 31 remarks that Bihar natives who have been living in Maharasthra, especially in Mumbai, shall be kicked out from Maharashtra were defaming and that his provocative statement is against national integration as the Indian Constitution has given the right to any person to live anywhere in the country peacefully," said Sharma in his complaint.
The MNS chief had made the remarks reacting to a media report that Bihar Chief Secretary Navin Kumar wrote to Mumbai Police Commissioner voicing displeasure over the arrest of a youth from Bihar for vandalising the martyr's memorial during the Azad Maidan protest on August 11 in Mumbai.
Thackery was summoned by another court on August 30 in three different cases pertaining to attacks by MNS supporters on north Indian students, including those from Bihar, appearing for the railways' entrance exam in Mumbai on October 20, 2008.