Gunmen have attacked Save the Children Organization’s office in PD3 of Jalalabad city of Nangarhar province, officials confirmed.

Officials confirmed one suicide bomber detonated his explosives at the gate of the compound, at about 9am local time, opening the way for other gunmen to enter.

Within an hour, hospital officials confirmed at least 11 people were wounded in the attack. However it is not known if these were employees of Save the Children organization or if they had been passers-by.

By 11.30 am clashes were still ongoing and dozens of Afghan Special Forces had moved in to the area.

Worried relatives of Save The Children organization had also gathered nearby anxiously waiting for news of their family members, who they believed might be trapped inside.

Ambulances were also parked close to the scene of the ongoing clash.

Eyewitnesses earlier reported that residents and children from a nearby school were seen running from the area as gunfire rang out. Eyewitnesses also said four attackers are involved but officials have not confirmed this. 

The Save the Children Fund, commonly known as Save the Children, is an international non-governmental organization that promotes children's rights, provides relief and helps support children in developing countries.

The Taliban has meanwhile distanced itself from the attack and said in a Twitter message that it is not involved. 

This is a developing story - more details to follow.