Nearly a dozen schools in Ahmedabad received anonymous emails threatening bomb blasts on Friday, prompting police to conduct a thorough search of the institutions, during which nothing suspicious was found, officials said.

The threats received by schools in the morning hours sent schools and parents into a tizzy, but later turned out to be a hoax, police said. Prominent institutions, including DPS, Army School, and Mahatma Gandhi International School, received emails threatening blasts, warning them against hoisting the tricolour on Republic Day and calling Prime Minister Narendra Modi and Union Home Minister Amit Shah "enemies of Khalistan", they said.