Saudi Arabia has shared intelligence with the U.S. warning of an imminent attack from Iran on targets in the kingdom, putting the American military and others in the Middle East on an elevated alert level, said Saudi and U.S. officials

In response to the warning, Saudi Arabia, the U.S. and several other neighboring states have raised the level of alert for their military forces, the officials said. They didn’t provide more details on the Saudi intelligence.

Pentagon press secretary Air Force Brig. Gen. Pat Ryder said Tuesday during a press briefing that the U.S. remains “concerned” about “the threat situation in the region” and is “in regular contact” with Saudi officials.