The preliminary probe by police has revealed that the bomb threat emails sent to over 15 schools in Bengaluru have some jihadi content, said sources on Friday.

Sources said the letter stated, "Convert to Islam or die under the weight of sword of Islam. Bismillah, we will spread the true religion of Allah to the whole of India."

"You have choice to become our slaves or accept the true religion of Allah. Temples, your idols, from Buddha to infinity, they will fly apart from our explosions," the threat email claimed.

School children
School childrenIANS

The email further stated that there were explosive devices in the school premises. Referring to Mumbai terror attacks, the email claimed that "on November 26, martyrs in the way of Allah killed hundreds of idolaters. It is truly powerful to hold a knife over tens of millions of kafirs".

The authorities said that the communal writing in the letters has made them take a serious note of the development. They also stated that it might be the handiwork of a prankster as well. The investigation will reveal everything, sources said.

On Friday morning, more than 15 reputed schools received bomb threats through email on their official email Ids. The incident had triggered tension and concerns in the city.

Deputy Chief Minister D.K. Shivakumar, reacting to the media over bomb threats, appealed to the people not to panic. "Few will indulge in such acts. We need to be careful. Cyber crime police are doing their job well. Police have taken immediate action. Earlier, a person who got late to flight had given a bomb threat," he said.

DK Shivkumar

What schools are saying?

Many schools took prompt action in wake of the threats. Advisory was issued to parents, either to pick their children or to remain calm as the authorities take action. 

"There is a rumour going on of a bomb scare in few schools of Bangalore. Kindly note that we are on vigil and so far, we have NOT received any such alerts from police or any other government official / department. We request you to be calm. We are watchful and being vigilant. Your kids are our responsibility too. Be rest assured, we will keep you informed if there are any developments that needs to be brought to your attention," Bengaluru's Carmel Convent school said in its advisory.

"Your ward is safe in school and we will be in touch if there is a need. Please don't worry," Zenith Academy said in a statement.