The INITIAL theory is that Iranian anti aircraft battery may have brought down the plane. The video and flight data would be consistent with an explosion when the plane was around 8,000 feet…not a technical issue.
The other possibility…without going too far into the conspiracy side…is that an entity is using Rouhani’s Twitter reference to Iran Air 655 to pin this crash on the Iranians. But I have a hard time believing the Iranians would reference that and shoot down a civilian airliner the very next day.
Sad just pulled this from CNBC. “The aircraft had been carrying citizens of Canada, Iran, Sweden and Ukraine. Ukrainian airlines suspends all flights to Iran indefinitely”.
Also said it wasn’t the plane that was having all the problems but and older Boeing.