REUTERS: Eleven people were killed or wounded in a blast in the northern Afghan city of Kunduz, a health official said on Thursday.
A separate blast caused at least 11 more casualties in Kunduz, another northern Afghan city, according to a provincial health official.
The explosions came during the Islamic holy month of Ramadan and two days after blasts tore through a high school in a predominantly Shi'ite Hazara area in western Kabul, killing at least six.
Zia Zendani, the spokesman for the provincial health authority, said 11 people had been killed and 32 wounded in the blast.
The Shi'ite community, a religious minority in Afghanistan, is frequently targeted by Sunni militant groups, including Islamic State.
There were no details on the location or cause of the blast in Kunduz.
A resident of Mazar-e-Sharif said she was shopping with her sister in a nearby market when she heard a large explosion and saw smoke rising from the area around the mosque.
Afghanistan's Taliban rulers say they have secured the country since taking power in August, but international officials and analysts say the risk of a resurgence in militancy remains and the Islamic State militant group has claimed several attacks.