Chandigarh: Expressing grief over the death of Marshal of the Indian Air Force Arjan Singh, Chief Minister Capt Amarinder Singh on Saturday declared a three-day state mourning. There would be no official celebrations and the National Flag would fly at half-mast in all government buildings during these days, an official spokesperson said. In a condolence message, the CM said Arjan Singh’s contribution to the nation would forever remain etched in history. Amarinder also lauded Arjan Singh’s outstanding services as an envoy to various countries. TNS