"The timing of elections, taking data from so many schools, using Russian IP addresses using VPNs--all these are pointing towards a conspiracy," the sources said.
The investigation so far has revealed that 'Sawariim' (clashing of the swords) is an Arabic word, that has been used by the Islamic State since 2014 to spread Islamist propaganda.
After around 60 schools in Delhi-NCR received bomb threats via mail on Wednesday, VK Saxena, Delhi Lieutenant Governor, visited DAV School in Model Town and assured the citizens of safety and said the culprits behind this incident will not be spared.