An unidentified person called up Sir H N Reliance Foundation Hospital in south Mumbai on Wednesday and threatened to blow it up, a police official said.
"The caller also issued threats in the name of some members of Ambani family," he said.
The person called up the hospital's landline number at 12.57 pm from an unknown number, the official said.
An FIR has been registered at DB Marg police station against the unidentified person and an investigation is on into the matter, he added.
In August this year, a jeweller was arrested after he allegedly calling up the hospital and threatened to kill industrialist Mukesh Ambani and his family members.
In February 2021, a sports utility vehicle (SUV) laden with explosives was found near Ambani's south Mumbai residence 'Antilia'.
Later, some people, including the then-police officer Sachin Waze, were arrested in connection with the incident.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
For Threat To "Blow Up" Mukesh Ambani's Home 'Antilia', Bihar Man Arrested Reliance MF Ups Stake in Indian Hotels Getting Treatment for a Disease is Expensive, Staying Healthy is Inexpensive: PM Vandalism At Kolkata Hospital Where Doctor Was Raped, Tear Gas Fired 150 mg Semen In Kolkata Doctor's Body, Suspect Gang-Rape: Parents To Court 2 French Rafale Jets Collide Mid-Air, Instructor, Pilot Missing Trump Speaks With Netanyahu Over Gaza Truce And Hostage Deal, Says Sources Indian-Origin Man Jailed For Helping Friend In Singapore Football Scam Professor 'Digitally Arrested' For 12 Days By Scammers, Loses Rs 12 Lakh Track Latest News Live on NDTV.com and get news updates from India and around the world.