Not Israel. They have already denied involvement. They don't speak at all if it was them conducting an operation.

There's a good video of it where you can see fireworks doing fast burns before whatever it was blew. Would have needed to be a hell of a lot of nitrates to do that. There are balconies and facades knocked off buildings 2 miles away.

The orange smoke is indicative of nitrates but is not a determining factor as it could be caused by other agents as well especially if contaminated with water or other agents that would cause inefficiency during detonation.