For months now, the Russian government has attempted to paint America’s presence in the Middle East as a jumping off point for covert support of the Islamic State, a terror group the United States has been heavily involved in fighting in Iraq, Syria and elsewhere around the world. Now, after a number of previous attempts have been proven false, the Kremlin has issued a new round of accusations, now claiming that the U.S. and other NATO nations have been providing supplies to ISIS fighters via mysterious helicopter flights.

We still expecting from our American colleagues an answer to the repeatedly raised questions, questions that arose on the basis of public statements made by the leaders of some Afghan provinces, that unidentified helicopters, most likely helicopters to which NATO in one way or another is related, fly to the areas where the insurgents are based, and no one has been able to explain the reasons for these flights yet,” Russian Foreign Minister Sergei Lavrov said during a meeting with his Pakistani counterpart, Khawaja Muhammad Asif, on Tuesday.

“In general they [the United States] try to avoid answers to these legitimate questions.” He added.

These accusations appear to be based on a statement made by Mohammad Zahir Wahdat, the governor of Afghanistan’s northern Sar-e Pol province last May. Wahdat reported that his security forces spotted unmarked military helicopters touching down briefly in an area that was known to be a militant stronghold. He went on to explain that, because the event occurred at night, his troops were unable to take any pictures or videos of the incident, but they did note that the helicopters flew north when they took off once again.