Around 30 schools in Delhi received bomb threats over email early on Friday, triggering a multi-agency search of the premises. Nothing suspicious was found in any of the schools after the searches.

The development came within days since at least 44 schools received similar emails on December 9. Police had declared those threats as hoaxes.

A Delhi Fire Services official told news agency PTI, "We received calls (regarding the threat emails) from Bhatnagar International School in Paschim Vihar (4:21 am), Cambridge School in Shri Niwas Puri (6:23 am) and DPS Amar Colony in East of Kailash (6:35 am)."

As per reports, the list of schools includes Delhi Public School in the East of Kailash, Salwan Public School in Mayur Vihar and Cambridge School in Srinivas Puri amongst others.

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In view of the current situation, the school authorities have sent messages to guardians to not send their wards for classes.

According to Cambridge School principal Madhavi Goswami, she was checking the school mail, as routine, when she saw the threat. "I informed the police and they worked proactively. We were assured by the Delhi Police about the investigation. We informed the parents that classes would be online today," she said.

Furthermore, a message was received by Karmveer, a guard at South Delhi Public School, at 7:20 am, following which they started to ask the parents coming to school with their children to return.

"The school administration declared that all the students should be asked to return. Only a few children were already inside the campus and they were also sent back," he told PTI Videos.

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The incident came within days since around 44 schools in Delhi received a bomb threat mail.As per police officials, the sender of the mail threat demanded USD 30,000 from school authorities.

Following the scare, Delhi schools suspended their classes and urgently sent students back home. Officials from the Delhi Fire Services (DFS) added that bomb detection teams, fire officials, local police and dog squads responded immediately and conducted searches at the schools.

ALSO READ | Bomb Threat To 200 Delhi Schools: What Really Happened

Back in May, bomb threats to over 200 schools across Delhi and NCR  sent authorities into alert mode and parents into panic, prompting the Ministry of Home Affairs (MHA) to step in and issue a statement that the threats were most likely hoax.

Teams of police, bomb squad, fire service and other agencies rushed to conduct checks, parents left home or offices to pick up their children as the count of schools that received threats grew rapidly. Some schools that did not receive threats also asked parents to pick their ward as a precautionary measure.

The MHA, Delhi Police later said nothing was found after thorough checking. Delhi Police Crime Branch Special CP Ravinder Yadav said apart from schools, these emails were received by some hospitals also.

(With PTI Inputs)ps88