Picture is not clear. However, this image posted via Twitter within the last hour, unquestionably shows green buses on fire:
Meanwhile, Al Manar TV (controlled by Hezbollah) show other (not green) types of buses heading for the crossing zone in Aleppo:
Fars News maintain Fua’a and Kafraya evacuations are the ones sabotaged due to infighting between Jabhat Fateh al-Sham and Ahrar al-Sham near those places:
So, were the green buses once in Aleppo moved to Idlib to be replaced by other buses in Aleppo? The truth about which buses were destroyed, by whom and why remains obscure, as of this writing – though clearly something unhelpful has occurred.
Update. As at 3.25pmGMT, text of AP article timed 2pmGMT (text will be found repeated in various newspapers):
BEIRUT (AP) — The Latest on the conflict in Syria (all times local):
Activists say militants have burned at least five buses assigned to evacuate wounded and sick people from two villages in northern Syria. The incident could scuttle a wider deal that encompasses the evacuation of thousands of trapped rebel fighters and civilians from the last opposition foothold in east Aleppo.
The opposition’s Britain-based Syrian Observatory for Human Rights said Sunday that the al-Qaida affiliated Fatah al-Sham Front burned buses assigned to evacuate people from the rebel-besieged villages of Foua and Kfarya.
Hezbollah, the Lebanese militant group fighting alongside Syria’s government, says the buses were burned during fighting between the al-Qaida-affiliated Fatah al-Sham Front and a rebel group that supported the evacuations.
The Observatory says six buses were burned while Hezbollah’s media outlet put the number at five.
It does seem that most detail on this incident, thus far, is coming from Iran.