A roadside bomb explosion targeted a civilian bus in western Farah province of Afghanistan, leaving scores of passengers dead or wounded.
Provincial governorís spokesman Nasir Mehri confirmed that the incident took place on Herat - Kandahar highway at around 4:30am local time.
Mehri further added that the blast ripped through a passenger bus, leaving at least eight dead and at least 40 others wounded.
In the meantime, a security source said at least 11 people were killed and at least 31 others sustained injuries in the explosion.
No individual or group has so far claimed responsibility behind the incident.
Taliban and other militants often use IED as the weapon of their choice to target the security forces and government but in majority of such attacks ordinary civilians are targeted, besides such attacks often claims the lives of the militants as well.
The UN Assistance Mission in Afghanistan (UNAMA) in its latest report stated that 1,692 civilians were killed in the first six months of 2018.
According to UNAMA, the use of improvised explosive devices (IEDs) in attacks by Anti-Government Elements remained the leading cause of civilian casualties.
"The combined use of suicide and non-suicide IEDs caused nearly half of all civilian casualties. Continuing trends first documented last year by UNAMA, the majority of IED casualties were caused by suicide and complex attacks, which again were responsible for record high civilian casualties, resulting in 1,413 civilian casualties (427 deaths and 986 injured), a 22 per cent increase," UNAMA said.