A blast occurred near the funeral of the former deputy governor (acting governor) of Badakhshan in Badakhshan province, a local official said.
Mazuddin Ahmadi, the head of the information and culture department of Badakhshan confirmed for TOLOnews that the explosion took place in Faizabad, the capital of Badakhshan.
Mazuddin told TOLOnews that Safiullah Samim, the former commander of Baghlan police, was killed in an explosion during the funeral ceremony of the former deputy governor of Badakhshan province.
A spokesman for the Ministry of Interior, Abdul Nafay Takor, said based on initial findings at least 11 people were killed and more than 30 others were wounded in the blast.
The attack faced widespread reactions by the Afghan politicians.
Hamid Karzai, former president of Afghanistan, in a tweet strongly condemned today's attack in the Nabawi mosque in the Hesa-e Awal area of Faizabad, the center of Badakhshan province.
Hamid Karzai in a tweet called it "terrorism" and "against human and Islamic standards" and expressed his sympathy for the affected families.
Abdullah Abdullah, former HCNR chairman, in reaction to the explosion, tweeted that "attacking mosques and religious places is an act contrary to the rules of Islam and human principles and there is no justification."
The spokesman for Iran's foreign ministry, Nasir Kanani, on Twitter, condemned the attack.
A source from the provincial hospital, who was speaking on condition of anonymity, told TOLOnews that they received 15 dead bodies and 50 wounded.
Locals told TOLOnews that the explosion took place inside the Nabawi mosque in the Hesa-e-Awal area of Faizabad.
On Tuesday, the acting governor of Badakhshan province, whose formal position was deputy governor, Mawlawi Nisar Ahmad Ahmadi, was killed in a vehicle bomb blast that occurred in Faizabad, the provincial capital.