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.