Militants abducted seven people, including six Indians, on Sunday in Afghanistan's Baghlan province, officials said, adding that talks were on to get them freed.
Habib Shah Ansari, the provincial mind of public well-being, confirmed the cost from the assault, that happened in the city of Khost, also the funding of the province of the identical title.
They were abducted while traveling to the area, where the company owns an electricity sub-station contract.
No one has claimed the abduction, but the Taliban have a strong presence in Baghlan.
The External Affairs Ministry said in New Delhi it is in touch with authorities in Afghanistan and is ascertaining the details of the incident. No group has, however, claimed responsibility.
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An Afghan official says a bombing at a mosque in the eastern Khost province that was being used as a voter registration center killed 12 people and wounded another 33.
At least 31 Taliban militants were killed by Afghan security forces backed by U.S. air strikes in Afghanistan's central Ghazni province, as the Afghan army battled to protect a key highway, officials said.
Last month, an Islamic State suicide bomber attacked a voter registration centre in Kabul, killing 60 people and wounding at least 130 others. Police spokesman Karim Yuresh said another civilian was wounded in Sunday's attack, in an area where both the Taliban and IS are active.
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. "Now, the ISI-backed Taliban will find it hard to attack Indian interests in the country for fear of annoying Big Brother Beijing".