Two hospitals in Delhi were targeted by bomb threats via email on Sunday afternoon, prompting authorities to mobilise multiple teams of bomb disposal squads at both locations, reports NDTV.

The Burari Hospital was the first to report the bomb threat at 3.15pm, fire officials said. The second call came from Sanjay Gandhi Memorial Hospital around 4.26 pm.

The search operation is underway at both hospitals.

This incident follows closely on the heels of a recent spate of similar threats in Delhi and Ahmedabad. Just days ago, more than 130 schools across Delhi-NCR received identical emails, alleging the presence of explosives on their premises.

The perpetrators had used the Arabic word 'Sawariim', meaning clashing of swords and associated with ISIS propaganda. But investigators have said it is unlikely that the ISIS is involved.

An FIR was registered against unknown persons stating that the intention of the bomb hoax e-mails was to create mass panic and disturb public order in the national capital.