Local residents near Sardar Mohammad Dauod military hospital say a group of gunmen just launched an attack on the famous hospital with one of the intruders exploding his explosive west at the entry gate of the hospital, while others began exchange shootings with Taliban fighters guarded nearby.
Taliban spokesman Bilal Karimi has also confirmed the incident but gave no further details.
Local residents confirm they heard two explosion from the site.
The attack has left 20 killed and 40 wounded and the casualties toll is likely to increase.
The dead are not identified.
It is said the condition has turned normal at the attack site.
No group has taken responsibility of the attack.