The bus began its journey in the capital of Helmand province and was scheduled to stop in Kandahar city, then travel north to Kabul, the Afghan capital, Razaq said.
However, scheduled engineering works will be taking place on some routes and customers are strongly advised to check their planned journey before setting out.
"Scheduled engineering works will be taking place this weekend on some routes and customers are strongly advised to check their planned journey before setting out, " said a Greater Anglia spokesman.