The incident happened in the Baghlan-e-Marzaki district.
The maimed deminers, along with the bodies of the slain, were transferred to a public hospital in Pul-e-Khumri City, the center of Baghlan.
HALO Trust, a mine clearance organization, confirmed that 10 of its stuff were killed and 16 others were maimed by unknown gang at a demining camp in Baghlan province on Tuesday night.
"Around 110 men, from local communities in northern Afghanistan, were in the camp having finished their work on nearby minefields," it said.
"We strongly condemn the attack on our staff, who were carrying out humanitarian work to save lives," it said.
The Interior Affairs Ministry's front man Tariq Arian blamed the Taliban
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for the attack.
The Taliban has denied involvement in the attack, an no other group has grabbed credit.