The United Kingdom Maritime Trade Operations center said it received reports that the vessel was taken by unauthorized personnel while anchored 38 nautical miles northeast of the UAE port of Fujairah, near the Strait of Hormuz.
The seizure comes as U.S. President Donald Trump was meeting with Chinese leader Xi Jinping on a much-anticipated visit to Beijing. The leaders' talks are expected to focus on the war with Iran, which has seriously disrupted trade in oil, gas and other products and rattled the global economy.
It happened hours after Israel said Prime Minister Benjamin Netanyahu had quietly visited the UAE during the Israeli-U.S. war with Iran, though the UAE swiftly denied that any secret visit had occurred.
The Gulf nation normalized relations with Israel in 2020. Iran has criticized that agreement and has repeatedly suggested over the years that Israel maintained a military and intelligence presence in the UAE.
Israeli leaders have made occasional visits to the UAE in recent years after normalizing relations.