Thackeray had made the “infiltrator” remark on Friday in reaction to reports of a letter from the Bihar chief secretary warning Mumbai police against picking up suspects from the state without informing the Bihar police.
Parties across the spectrum slammed Thackeray. Congress general secretary Digvijaya Singh said the Thackeray family itself belonged to Bihar and had settled in Dhar in western Madhya Pradesh from where they migrated to Mumbai.
Bihar deputy chief minister and BJP leader Sushil Kumar Modi termed Thackeray’s remark “irresponsible and unwarranted”.
Meanwhile, an advocate filed the case against Thackeray in a court in Muzaffarpur district under a section related to sedition among others.