Kathmandu, Sept 12: Prime Minister Pushpa Kamal Dahal ‘Prachanda’ said he was stunned from the passing away of Constituent Assembly (CA) Chairperson and former Speaker Subas Nembang. Reaching the Maharajgung-based Teaching Hospital this morning, Prime Minister Dahal paid tribute to Nembang and extended condolences to the grief-stricken family members. CPN-UML vice-chairperson Nembang died of heart attack this morning.