Security has been beefed up ahead of singer Diljit Dosanjh's concert at Mumbai's Mahalaxmi Racecourse on November 27, after the singer received an. Diljit Dosanjh’s Mumbai concert received a bomb threat via email, but despite this, the event will go as planned. Ahead of Diljit Dosanjh’s concert on November 27 at the Mahalaxmi Racecourse,.