According to the local media reports, the Afghan Ministry of Interior (MoI) has confirmed the death toll.
Earlier today, MoI had said that five people were killed and 163 others injured.
According to the Khaama Press, Afghan President Mohammad Ashraf Ghani has instructed that the national flag should put at half-mast across all governmental institutions as well as the diplomatic missions outside the country.
Afghan President office in a statement said the decision was taken to mourn with the families of the deceased individuals who lost their lives in the attacks in Kabul, Nangarhar, and Kandahar.
A public holiday has also been declared only in Kabul for Monday to help the families of the victims as well as those injured.
The Afghan Government claimed that the Taliban-allied Haqqani network is behind the attack.
The explosion occurred when an explosive-laden ambulance was detonated in a busy area, which is close to Kabul's infamous Chicken Street. (ANI)