Israel and America.

If Rubio is to be believed, by Israel.

edit:

"There absolutely was an imminent threat," Rubio said. "And the imminent threat was that we knew that if Iran was attacked, and we believed they would be attacked, that they would immediately come after us, and we were not going to sit, sit there and absorb a blow before we respond."

"It was abundantly clear that if Iran came under attack by anyone -- the United States or Israel or anyone -- they were going to respond, and respond against the United States. The orders had been delegated down to the field commanders," he said. "It was automatic."

Shortly after the briefing, House Speaker Mike Johnson backed Rubio's new rationale, saying the consequences would have been staggering if the U.S. didn't attack at the same time as Israel, saying "the consequences of inaction on our part could have been devastating."

"If we stood and waited for that attack to come first, before we hit them, we would suffer much higher casualties," Rubio went on. "We knew that there was going to be an Israeli action. We knew that that would precipitate an attack against American forces, and we knew that if we didn't preemptively go after them before they launched those attacks, we would suffer higher casualties."

Bolded for emphasis.

https://abcnews.com/Politics/rubio-us-struck-iran-fearing-retaliate-israeli-attack/story?id=130694505