The greek media says it had dangerous cargo, mostly explosives.
The mayor said explosions were heard for an hour after the crash.
From other sources i heard speculation about engine failure
Before the crash, the pilot gave a distress signal and informed the dispatcher about the engine failure. It can be seen that the plane caught fire while still in the air, and after the fall there was a powerful explosion. It is reported that 8 crew members were killed. Electricity supply was interrupted in nearby settlements.
Greece withdraws all firefighters due to “unknown toxic materials on the plane” as a precaution