Israel has carried out a military strike on Iran, a US official told CNN, a potentially dangerous escalation in a fast-widening Middle East conflict that Iranian officials have so far sought to play down. Israel has not commented and Iran has not identified the source of the attack.

The United States has not been involved in any offensive operations, Secretary of State Antony Blinken said, after a US official told CNN that Israel had launched a strike on Iran.

The US was given advance notification Thursday of an intended Israeli strike in the coming days but did not endorse the response, a second senior US official previously said.

The U.S.-based data center would reportedly house a supercomputer made up of millions of AI chips.

The computer is rumored to be one of the largest and most advanced data centers in the world. It could take up several hundred acres of land, and require up to 5 gigawatts of power.

The proposed project costs about 100 times more than some of the largest data centers today, and Microsoft executives want to launch it as soon as 2028, according to The Information.

House Intelligence Committee Chair Mike Turner has made intelligence around a “serious national security threat” available to all members of Congress to review. Two sources familiar with the matter and a US official tell CNN the threat is related to Russia.

Multiple sources familiar with the intelligence characterized the intelligence as “very sensitive.”

Earlier Wednesday, Turner sent his Congressional colleagues a letter saying the urgent matter is “with regard to a destabilizing foreign military capability.”

One of the sources who has seen the intelligence confirmed that “it is, in fact, a highly concerning and destabilizing” Russian capability “that we were recently made aware of.

National Security Adviser Jake Sullivan said he had personally reached out to set a meeting with top lawmakers on national security committees before Turner warned publicly of what he termed the “serious national security threat.”

“I reached out earlier this week to the Gang of Eight to offer myself for up for a personal briefing to the Gang of Eight and, in fact, we scheduled a briefing for the for House members of the Gang of Eight tomorrow,” Sullivan said from the White House. “That’s been on the books. So I am a bit surprised that Congressman Turner came out publicly today in advance of a meeting on the books for me to go sit with him alongside our intelligence and defense professionals tomorrow.”

Sullivan said he remained focused on sitting down with Turner on Thursday for the meeting.

He declined to elaborate on the nature of the threat.

“I’m not in a position to say anything further from this podium at this time,” he said.”