"Italy sends a message of affection, solidarity and regard to Save The Children," Angelino Alfano told a national aid and development conference.
"What happened to Save the Children fills our hearts with sadness and reminds us how much those who are on the frontline - not behind a desk - need security," Alfano said.
The Islamic State jihadist group claimed the assault in which the gunmen used a car bomb and rocket-propelled grenades.
The IS, which has established a foothold in eastern Nangarhar province, said in a statement it was targeting British and Swedish groups in the region.
All Save the Children programmess across Afghanistan were temporarily suspended and offices shut after Wednesday's attack.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
