"There was a car bomb explosion near a military court in Gardez, a populated area, and dozens of civilians are feared killed and wounded," said Tariq Arian, a spokesman for the Interior Ministry.
The bombing comes two days after at least 56 people were killed in attacks in other areas of the country, including women and newborn children, in a setback for peace plans in the war-torn country.
Zabihullah Mujahid, a Taliban spokesman, said in a statement the Taliban's responsibility for the attack, according to Reuters.
On May 11 this year, four mines planted along the roadside exploded in a neighborhood north of the Afghan capital, Kabul, wounding four civilians, including two children were wounded.
It is noteworthy that Washington and the Taliban signed a historic peace agreement in Doha on February 29 this year to start withdrawing American soldiers from Afghanistan after 18 years of war.