The Madhya Pradesh High Court’s Gwalior bench has received an email threatening a bomb blast and referring to Diljit Dosanjh’s 15 November Indore concert, police said. Security at the court has been tightened, and teams from Indore and Bhopal are helping trace the sender. Earlier, three schools and the Indore Mayor’s office had received similar threats, while Dosanjh has insisted the concert will go ahead.