Karnataka Deputy Chief Minister D K Shivakumar on Tuesday said that he and Chief Minister Siddaramaiah have received an email threatening to cause explosions in the State if they don`t pay up USD 2.5 million (Rs 20.7 crore).

The state Congress chief also told reporters that he has forwarded the email to the police officers who are now on the job to trace the sender. "I and the Chief Minister Siddaramaiah received the mail three days ago. It is in my phone and I have sent it to the police for investigation," he said.