Punjab Chief Minister Bhagwant Mann today said that those involved in the attack on singer Sidhu Moose Wala won't be spared. The Aam Aadmi Party leader also urged everyone to remain calm. "I am shocked and deeply saddened by the gruesome murder of Sidhu Moosewala. Nobody involved will be spared. My thoughts and prayers are with his family and his fans across the world. I appeal everyone to stay calm," Mr Mann posted on Koo.