Israel has escalated its ongoing conflict with Iran, striking the world's largest gas field and other energy infrastructure as part of a two-day assault that had otherwise largely targeted sites and personnel tied to the Islamic Republic's armed forces and nuclear program.

Israel attacked Iran's capital early Friday, with explosions booming across Tehran.

Iran retaliated late Friday by unleashing scores of ballistic missiles on Israel, where explosions flared in the skies over Jerusalem and Tel Aviv and shook the buildings below.