Oil prices surged and stocks closed significantly lower on Friday in the immediate hours after Israel began an attack on Iran targeting nuclear sites and senior military officers. The strike stoked concern among investors about a possible wider conflict across the Middle East,

The Dow Jones Industrial Average was heading for a weekly loss in early-afternoon trading Friday, with stocks remaining weighed down by worries over Israel’s attack on Iran. The Dow’s 1% drop Friday had it on track to fall 0.