I am the number one terrorist,” said the 57-year-old man in his call to the Reliance Foundation Hospital, while threatening to kill industrialist Mukesh Ambani, police said on Monday.

He even abused the National Investigation Agency (NIA), the Anti-Terrorism Squad (ATS) and the Mumbai police, officers said. The caller identified himself as one Afzal; however, police later found out that his name is Vishnu Bhushan Bhumik, a resident of Dahisar.