An offence has been registered against four persons for allegedly cheating an elderly doctor and taking over his hospital using fabricated documents in Maharashtra`s Thane district, police said on Saturday.

Based on a complaint lodged by the 79-year-old doctor, the police on Friday registered a case under sections 406 (criminal breach of trust), 420 (cheating) and other relevant provisions of the Indian Penal Code, an official from Kalwa police station said.