An official on Friday said that a 75-year-old man and his three sons have been arrested for allegedly killing a 20-year-old Thane resident after he alleged involvement of one of the accused in a mobile theft case, reported news agency PTI.

The accused, identified as Ashok Sawant (34), Kishore Sawant (37), Sachin Sawant (29) and their father Nandu Sawant allegedly fatally stabbed victim Subham Arvind Pawar in the city's Azad Nagar locality in the intervening night of September 24-25, reported PTI.