Haley used the charred remnants of an Iranian missile as a backdrop to call for action against Tehran's "malign influence."
Akayed Ullah posted a statement on his Facebook account just before the Monday morning attack.
A pipe bomb that was strapped to a man went off in the New York City subway near the Times Square area of Manhattan.
Now that the jihadists have been cleared from all but a few pockets, the United States is assessing its future presence.
After the protests, the Pentagon has barred the further release of works created at the military-run prison.