A "suspicious transaction" worth Rs 15 crore is under the lens of the Enforcement Directorate, which probes financial crimes, in the investigation into actor Sushant Singh Rajput's death, sources have said. The agency has sought details of a police case filed by the actor's father in Bihar to probe the transaction allegedly involving the brother of Sushant's girlfriend Rhea Chakraborty. The 34-year-old actor had died by suicide at his Mumbai apartment last month, the police have said.