The Houthi claimed it, but they didn't build it, Iran did (with an assist from Obama). The launch and trajectory of pretty much everything on Earth is tracked from ground and orbit. It came from Iran.
Seems to me it was Israeli designed drones...
hmmm...
Though both China and Turkey has them...
Black market.
Why did Israel sell such tech to the Turks and the Chinese anyhow?`
Pay attention smart man...