U.S. futures were down more than 0.4%.
A Kuwaiti oil refinery came under Iranian drone attack early Friday as Tehran shows little signs of letting up on its attacks on Gulf region energy structure.
Oil prices had a roller-coaster day on Thursday with Brent crude, the international standard, briefly surging to around $119 per barrel as attacks by Iran escalated after Israel's attack on Iran’s key natural gas field.
On Friday, Brent crude resumed its gain following a dip earlier in the day, rising 1.6% to $110.36 a barrel. Benchmark U.S. crude was up 0.3% to $95.80 a barrel.
Israeli Prime Minister Benjamin Netanyahu said late on Thursday he would hold off on further attacks on Iran’s gas field at the request of U.S. President Donald Trump.
