Several vessels in the oil-rich Persian Gulf have been targeted in recent days as the US and Israel’s war with Iran spreads to the sea, sparking fears that disruption to the global oil supply could hit the world’s economy.

On Wednesday night, two foreign oil tankers in Iraqi waters were set ablaze by an Iranian attack, killing at least one person, with dozens of crew members rescued. Iran claimed responsibility, saying an underwater drone “blew up two oil tankers in the Persian Gulf,” Iranian state broadcaster IRIB reported.