(Associated Press Photo)

DUBAI, United Arab Emirates (AP) — Global energy prices spiked Monday by a percentage unseen since the 1991 Gulf War after a weekend attack on key oil facilities in Saudi Arabia caused the worst disruption to world supplies on record, further fueling heightened tensions between Iran and the U.S.

American officials released satellite images of the damage at the heart of the kingdom's crucial Abqaiq oil processing plant and a key oil field, alleging the pattern of destruction suggested Saturday's attack came from either Iraq or Iran — rather than Yemen, as claimed by Iranian-backed Houthi rebels there.

Iran rejected the allegation, with a government spokesman saying now there was "absolutely no chance" of a hoped-for meeting between Iranian President Hassan Rouhani and President Donald Trump at the U.N. General Assembly next week.

For his part, Trump sent mixed signals, saying his "locked and loaded" government waited for Saudi confirmation of Iran being behind the attack while later tweeting that the U.S. didn't need Mideast oil, "but will help our Allies!"

The tensions have led to fears that action on any side could rapidly escalate a confrontation that's been raging just below the surface in the wider Persian Gulf in recent months. There already have been mysterious attacks on oil tankers that Washington blames on Tehran, at least one suspected Israeli strike on Shiite forces in Iraq, and the downing of a U.S. military surveillance drone by Iran.