At least seven people have been killed after blasts hit two buses in western Kabul on Saturday, according to police.
The explosions took place in a neighborhood dominated by the minority Hazara community.
Similar attacks on buses there earlier this month killed 12 civilians.
Kabul's police spokesman Basir Mujahid added that the explosions had wounded at least half a dozen people.
Here's eyewitness, Fazel Ahmad Abedi.
"I just arrived here, and I do not know where the wounded and the martyrs were taken, but from what I see here, the situation in the area is very critical, and the number of casualties might be high. I still couldn't find my friend as his cell phone is off."
Violence has been rising in Afghanistan as foreign forces withdraw from the country by Sept. 11.
Efforts to broker a peace settlement between the Afghan government and insurgent Taliban have also slowed.
It was not immediately clear who was behind Saturday's attacks.
The Hazara community has also been the target of a number of attacks from the Islamic State militant group.
In May an unclaimed attack on a school in the area left around 80 dead - most of whom were school girls.