Local media said on Monday that explosives on a vehicle were detonated by its driver near the building of the Afghan National Directorate of Security (NDS) Special Unit in Ghazni Province in the early hours of the day.
The victims were believed to be mostly NDS employees.
No group has claimed responsibility for the attack as of yet.
Violence has spiked in Afghanistan in recent weeks. The Taliban militant group, which has struck a “peace” deal with the United States not to hit international forces in Afghanistan, has ratcheted up attacks on Afghan forces, even as it has been involved in a piecemeal prisoner swap with Kabul that was required under that same deal.
In a horrendous attack last Tuesday, three gunmen attacked a maternity hospital in Kabul, opening fire at pregnant women and newborn babies there. At least 24 people were killed and 16 others were injured before the gunmen were taken out by Afghan security forces.
Even though the Taliban said it was not responsible for that attack, a claim that the US also made, the Afghan government said the militant group was to blame.