The attack left several others injured.

Security forces rushed to the spot and the operation lasted for nearly six hours.

" Officials said a car bomb was detonated close to the entrance of the compound at about 11.30am and was followed by two gunmen storming the building," reported Tolo News.

Several employees escaped from the building.

However, some of them were trapped in the building.

The carnage came to an end at 5pm when the last attacker was eliminated, the governor’s spokesman, Attaullah Khogyani told Pajhwok Afghan News.

According to reports, Afghanistan President Ashraf Ghani has condemned the attack.

No group has claimed responsibility for the attack so far.

Image: UN website