Former Nepal Prime Minister and CPN Maoist Centre Chairman Pushpa Kamal Dahal's son Prakash Dahal passed away in Kathmandu this morning. The cause of death is not yet known. <br/><br/>He was rushed to a hospital in the wee hours. Hospital sources said, an official announcement will be made once the family members arrive. Mr Pushpa Kamal Dahal has left for Kathmandu from Jhapa, where he was attending election campaign for the upcoming polls.