A shop in Madhya Pradesh's Indore has received a letter threatening that bomb blasts would be carried out in the city if the participants of the Bharat Jodo Yatra led by Rahul Gandhi make a scheduled overnight stay at a local stadium on November 28, prompting the police to launch investigation, an official said on Friday.

Police have registered a case against an unidentified person in this connection, he said, adding that they suspect that it was a hoax threat.