Oil prices fell on Friday morning and are heading for steep weekly losses amid easing supply concerns as more stranded oil tankers exited the Strait of Hormuz, even though a cargo vessel was hit near Oman on Thursday.
Brent crude futures fell 19 cents, or 0.25%, to $75.07 a barrel as of 0055 GMT, while U.S. West Texas Intermediate fell 13 cents, or 0.18%, to $71.79 a barrel.
Both benchmark contracts jumped more than 2% on Thursday after a cargo vessel was hit by an unknown projectile near Oman, prompting the U.N.'s shipping agency to suspend its voluntary evacuation scheme.
Two U.S. officials told Reuters that Iran fired on the cargo ship as it attempted to pass through the strait. Iranian authorities said the security of vessels passing outside designated Hormuz routes is not guaranteed.
"With the geopolitical risk premium once again creeping back into prices, markets will be watching intently to see if tanker traffic resumes or if these latest hurdles force producers to tap the brakes on planned production increases," said IG analyst Tony Sycamore.
Brent and WTI crude are both set for losses of close to 7% this week.
Data showed on Thursday that crude shipments through the Strait of Hormuz rose this week to their highest level since the U.S.-Israeli conflict with Iran began in February after a ceasefire deal reopened the waterway, while concerns about how long the strait would stay open also boosted trade.
However, overall traffic remain a fraction of the daily average of 125 ships passing through the strait before the February 28 conflict began.
Meanwhile, earthquakes in Venezuela that happened on Thursday also raised supply concerns.
Preliminary assessments by workers of Venezuela's vast oil, gas and refining infrastructure so far showed limited damage, as most of the country's largest output regions, refineries, pipelines and terminals are far from the hardest-hit areas.
Still, a lack of power has cast doubt on whether oil output can be sustained at its pre-earthquake level of close to 1.2 million barrels per day, sources said.
(Reporting by Sam Li and Lewis Jackson; Editing by Kevin Buckland)
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