ISLAMABAD, Feb 28 (APP): President Asif Ali Zardari on Tuesday strongly condemned the incident of firing at a bus in Kohistan killing several passengers and injuring many others.The President said the culprits of such heinous crime would not be spared.He prayed for the departed souls to rest in peace and for the grant of patience to the bereaved families.The President directed the concerned authorities to ensure best medical treatment for the injured.