Source: Sharecast
As of 1225 BST, Dow Jones futures were down 1.37%, while S&P 500 and Nasdaq-100 futures had the indices opening 1.44% and 1.60% lower, respectively.
The Dow closed 101.85 points higher on Thursday following the publication of last month's producer price index from the Bureau of Labor Statistics.
Futures headed south after Israel's defence minister declared a special state of emergency following an Israeli attack on Iran, targeting the country's nuclear facilities and missile factories, to which it retaliated by launching 100 drones.
Overnight, some 200 fighter jets attacked the country's main uranium enrichment facility at Natanz, as well as Iranian commanders and nuclear scientists, according to the Wall Street Journal. Mossad agents were also said to be hunting leadership targets in Tehran. The US Department of State claimed that Washington was not involved in the strike and did not assist with the attack on Iran in any way.
Following the attack, Brent crude futures surged 5.78% to $73.37 per barrel, while West Texas Intermediate futures were 6.06% higher at $72.16 a barrel.
Elsewhere, fears regarding unilateral tariffs resurfaced after Donald Trump said, "we're dealing with Japan, we're dealing with South Korea. We're dealing with a lot of them. So we're going to be sending letters out, in about a week and a half, two weeks, to countries, telling them what the deal is, like I did with EU."
On the macro front, a preliminary reading of the University of Michigan's June consumer expectations report will be published at 1500 BST.
Reporting by Iain Gilbert at Sharecast.com
