Spokesman Khalid Zadran told CNN that the blast did cause casualties, but did not specify further.
The incident occurred in the city’s police district 17 and security forces are on the scene investigating, he added.
Healthcare organization Emergency said on Twitter that its Kabul hospital had received 27 people following the explosion, including five children.
Bilal Karimi, the Taliban’s deputy spokesman, condemned the explosion in a tweet on Wednesday evening.
This is a developing story and will be updated.