Ruby Singh hanged herself in the flat when she was alone. The 25-year-old left behind a note written in Hindi in which she has said nobody should be held responsible for her suicide, they said.

The reason behind the extreme step taken by the actress, who hails from Bihar, was not yet clear, said Deputy Commissioner of Police (DCP) M Patil.

Ruby's parents reside at Patna. The incident came to light when one of her friends came to meet her.

"Ruby did not respond to the repeated door knocks by her friend. Worried, he forced open the door and found Ruby¿s body hanging from the ceiling fan," Patil added.

Her parents have been informed about the incident and they would be reaching Mumbai in a day or two, police said.