Punjab Police arrested Shimla Singh, the key accused in the Mansa grenade attack orchestrated by gangster-turned-terrorist Arsh Dalla. Singh, who threw the grenade at a petrol pump in October, was captured on Khokhar Road. He confessed to his involvement and admitted links to the murder of Gurpreet Singh Hari Nau. Dalla, recently arrested in Canada, is linked to terror activities in Punjab.