Police have arrested a 52-year-old woman, her elder son and a relative for allegedly killing her younger son in Maharashtra''s Thane district over a domestic row, an official said on Tuesday. On Saturday, the body of a 24-year-old man dumped in a plastic bag at Kasara Ghat in the district was recovered after his family members alerted the police, saying someone called them informing about the body lying in the valley, he said.

The Kasara police subsequently registered a case under Indian Penal Code Sections 302 (murder) and 201 (causing disappearance of evidence of offence). On the basis of suspicion, the police questioned the victim''s mother and elder brother, aged 25, local crime branch''s senior police inspector S C Manore said.