The broadcaster reported earlier in the day, citing a security source, that the blast, conducted outside a police headquarters, had left at least 18 people killed and over 100 others injured.
Afghan Chief Executive Abdullah Abdullah has suggested that the attack aimed at disrupting the upcoming presidential election, set to be held in late September.
Nasrat Rahimi, the spokesman for the Interior Ministry, confirmed the information about the bombing.
"At around 09.04 a.m. [04:34 GMT], an explosive-laden vehicle struck the first entrance of police HQ of district six," Rahimi said in a message sent to media outlets.
He also refuted reports that militants had entered the scene.
"The reports of militants [who] entered the scene are incorrect, there was only the car bombing," Rahimi stressed.
According to witnesses, gunfire has also been heard in the area.
The Interior Ministry's spokesman, Nasrat Rahimi, has confirmed that the bombing took place in the Hazara area, in the western part of Kabul.
The Taliban have claimed responsibility for the attack.