The Institute for Statecraft, based in Fife, received hundreds of thousands of pounds in Foreign Office money.
According to the Sunday Mail, leaked documents show it tried to promote tweets calling the Labour leader a "useful idiot" who helped the Kremlin cause, and attacked members of his staff.
Speaking on BBC Radio 4's Today programme, Duncan said he had learned about the allegations at the weekend and ordered an immediate investigation.
"I don't know the facts but if there is any kind of organisation for which we are paying which is involved in domestic politics in that way, I would totally condemn it, and I have already over the weekend asked for a report to be on my desk by 10 o'clock this morning to say if there is any such activity," he said.Asked if this meant anti-Labour attacks by Statecraft must stop, Duncan said: "Not only must it stop, I want to know why on earth it happened in the first place."
Duncan has previously responded to a parliamentary written question on the subject. His answer showed that in the 2017-18 financial year the Foreign Office funded the Institute for Statecraft's Integrity Initiative with £296,500. This financial year, the sum was due rise to £1,961,000, the answer said.













Comment: See also: Secret Scottish-based office led infowars attack on Labour and Jeremy Corbyn