A man was taken into custody by the Mumbai police on Monday for issuing threats to Reliance Industries Ltd (RIL) chairman Mukesh Ambani and his family, officials have said.
The man, identified as Afzal, made three to four calls on a landline number of the Reliance Foundation Hospital in Girgaon area around 10.30 am, he said.
After receiving information about the calls, the Mumbai police initiated a probe into it.
A preliminary enquiry suggested the caller was mentally unstable, the official said.
A process was on to register an FIR in this connection, he added.