Chandigarh: Punjab DGP VK Bhawra on Tuesday said they had leads on the grenade attack and would crack the case soon. Addressing a press conference here, he said a projectile hit the building. He said it is a big challenge for police as the explosive used was trinitrotoluene. News of second blast outside Mohali intelligence office is fake: SSP Mohali SSP Vivek Sheel Soni said news of a second blast outside the Mohali intelligence office which is being aired by some national news channels is baseless and false. He refuted the news that a second blast took place outside the Mohali intelligence office on Tuesday.