JERUSALEM, Israel -- Iran says it's working on missiles that can penetrate Israel's high-tech air defense systems.

Iranian Revolutionary Guards announced a three-day military drill of its surface-to-air missiles that will simulate attacks on its enemies.

IRG Gen. Ami Ali Hajizadeh, chief of the airspace unit, said Iran is nearly ready to test a new missile that can penetrate Israel's Iron Dome anti-missile defense system, adding that an Israeli military attack on Iranian nuclear plants would "provide us a reason to remove Israel from the earth."

Hajizadeh's announcement comes as the European Union's embargo of Iranian oil begins.

On Friday, Gen. Martin Dempsey, chairman of the Joint Chiefs of Staff, said a joint military exercise by the United States and Israel postponed earlier this year, was rescheduled for October.