The Thane city police have registered a case against a member of a political outfit for allegedly defaming Maharashtra Chief Minister Eknath Shinde's family, an official said on Monday.

Police said the suspect identified as Ajay Jaya of Dharmarajya Paksha made defamatory remarks after the Thane civic body on May 25 pulled down the extended portion of a sweet shop in the Panch Pakhadi area.