The White House has said Iran can launch a “significant” attack on Israel as soon as this week, AFP reports.

“We have to be prepared for what could be a significant set of attacks,” National Security Council spokesman John Kirby told reporters.

“We share the same concerns and expectations that our Israeli counterparts have with respect to potential timing here — could be this week,” added Kirby.

Kirby’s comments came as the United States is rushing an aircraft carrier strike group and a guided missile submarine to the region in a show of support for Israel.