All seven of them were abducted in Bagh-e-Shamal village of the Pul-e-Khomri city capital of Baghlan province, reported Afghan's TOLO News. The Taliban claimed the attack. "We are in contact with the Afghan authorities and further details are being ascertained".
Police told reporters in Kabul that the Indians and their Afghan driver were travelling to a government-run power station in a mini-bus when unknown gunmen abducted them.
Provincial council chairman Mohammad Safdar Mohseni said the group had ignored warnings to take a police escort through an area largely controlled by the Taliban.
There has been no claim of responsibility for the attack, but both the Taliban and ISIS are suspected as those groups have a history of targeting democratic elections. IS is not known to have a presence in Khost, but has expanded its footprint into other areas in recent years.
Last month, a suicide bomber killed at least 60 people and wounded more than 100 others who were registering to vote in the Afghan capital, Kabul.
Talib Mangal, spokesman for the provincial governor, confirmed Sunday's attack and provided the approximate toll.
Founded in Afghanistan, a vehicle taking shop keepers on their way to current market struck a road side bomb from Afghanistan's northern Faryab province, murdering a few.
However, Taliban spokesman Zabihullah Mujahid denied the reports that Kohistan district had been retaken, saying in a statement that security forces had been driven back.
In the eastern Paktia province, a automobile bomb killed two persons and wounded the next 3.