New Delhi, Feb. 23 -- Security has been tightened at all metro stations and prominent location across Delhi after a series of bomb threats were received via emails, an official said on Monday.

The emails stated "Delhi banega Khalistan" and warned of blasts at the Delhi Army School, Red Fort and metro stations within the next three days. The messages claimed that explosions would take place at the Army school at 1.11 pm, the Vidhan Sabha at 3.11 pm and the Red Fort at 9.11 am today, the official told PTI.

Following the threat specifically mentioning metro services, the Delhi Police stepped up security deployment across all stations of the Delhi Metro Rail Corporation network.

"A high alert has been sounded across the city. Additional fo...