Four people have been arrested in Thane for allegedly attempting to extort Rs 50 lakh from a former councillor after blackmailing him, officers said on Monday.

According to news agency PTI, the complainant is a former councillor from the Kulgaon Badlapur Municipal Council. He had received an objectionable photograph of himself with a woman. The sender of the message allegedly demanded Rs 50 lakh from him to not make the photo viral, a police release said.