The passenger bus (Ba 2 Kha-6263) collided head-on with the truck (Na 3 Kha-2993) at Basmadi-5. The bus was heading to Kathmandu from Sarlahi.
Injured people are being treated at Hetauda Hospital.
One dead, one hurt in truck-motorcycle collision
The secretariat said the move aims to ensure the participation of all Nepalis in the constitutional amendment process.