According to the police, Vyas, who appears mentally deranged, had also tried to implicate the girl, her father and her brother, besides some of her friends, in the 2010 Pune German bakery bomb blast case as well through the e-mail.
"He sent a fake e-mail to some media houses naming a girl, her father, brother and her friends, who he claimed were responsible for Hyderabad twin blasts and the explosion at the German bakery in Pune," Chauhan said.
The SP said that Vyas has confessed to sending the e-mail by creating a fake e-mail ID, in a bid to settle personal scores.
"He seems mentally disoriented and wanted to teach a lesson to the girl with whom he had shared good friendship earlier," Chauhan said.
A complaint has been registered against him and further investigations are on.