Officials and analysts say the recent Israeli strikes on Iran's air defenses and missile production sites left it vulnerable to more military action.

Iranian officials threatened that the country could use more powerful warheads in a retaliation against Israel, in an attack that may come as early as the day after the U.S. election.

In a grave escalation of warnings, the United States has issued what may be its most severe caution to Iran yet, following rising tensions in the Middle East. Washington has reportedly communicated to Tehran that any further attacks on Israel could trigger a forceful and unrestrained response from Tel Aviv.