KABUL -- The "Islamic State of Iraq and Syria" (ISIS) claimed two bomb blasts aboard minibuses that killed at least nine people Thursday (April 28) in Mazar-e-Sharif, a week after a deadly explosion at a Shia mosque in the city.
A string of deadly bombings targeting minority communities has convulsed the country in the past two weeks.
Thursday's blasts occurred within minutes of each other in different districts of Mazar-e-Sharif as commuters were heading home to break their daily fast, Balkh provincial police spokesman Asif Waziri told AFP.
"The targets appear to be Shia passengers," he said, adding 13 people were wounded in the blasts.
ISIS's Khorasan branch (ISIS-K) took responsibility for the bombings, which it said inflicted 30 casualties.
Images posted on social media showed one minibus engulfed in fire, while the other was mangled.
A series of sectarian bombings
The blasts came one week after an attack on a Shia mosque in Mazar-e-Sharif killed at least 12 worshippers and wounded scores more.
That explosion was followed a day later by the bombing of another mosque in Kunduz targeting the minority Sufi community.
It killed at least 36 people during Friday prayers.
In Kabul, another attack also targeted Shia, with two bombs detonated at a school, killing six students.
ISIS claimed the mosque attack in Mazar-e-Sharif, but no group has so far taken responsibility for the bombing in Kunduz or at the Kabul school.
ISIS-K in Sunni-majority Afghanistan has repeatedly targeted Shia and minorities such as Sufis, who follow a mystical branch of Islam.
Shia Afghans, who are mostly from the Hazara community, make up 10% to 20% of Afghanistan's population of 38 million.
Afghan authorities told AFP earlier Thursday that several arrests had been made in connection with the string of recent attacks.