"Iran can't get its act together. They don't know how to sign a non-nuclear agreement," the US president writes, urging the Iranians to "get smart soon."
The post features an AI-generated image of Trump wearing black sunglasses and holding an assault rifle, with explosions visible in the background.
"NO MORE MR NICE GUY," it says in capitals.
The post was published at 4 a.m. US time.
