During the last year and after weakening of ISIS in Syria and Iraq, their activities in Afghanistan have increased. There reports on moving some ISIS and other terrorists to Afghanistan.
Also Foreign Ministry of Russia reported unknown helicopters activities in Afghanistan which help ISIS terrorists financially and military several times.

The coincidence of this report with the news of transporting ISIS terrorists to American military bases from Deir Ezzur by American helicopters, have increased accusations on USA.

CSTO is a military treaty between governments of post Soviet common wealth states.

Although USA and allies deny these news, considering numerous reports of security agencies and specialists, part of ISIS terrorists have transported to Libya and Afghanistan from Iraq and Syria indeed.