Last week, two civilian crew members aboard the oil tanker Mercer Street were killed when so-called suicide drones detonated above its bridge as it sailed in the Arabian Sea.
The vessel is registered in Liberia and owned by a Japanese firm, but it is managed by the London-based company Zodiac Maritime, which is owned by Israeli billionaire Eyal Ofer.
It is the first time civilians have been killed in a shadowy battle between Israel and Iran. Israeli, US, and UK officials have blamed Tehran, which has denied involvement.
On Friday, the US military said the drones used were “nearly identical” to others used by Iran in the past.