TankerTrackers has located two Greek oil tankers seized by Iran last week, saying Delta Poseidon is held north of Larak island and Prudent Warrior is held in Bandar Abbas.

The independent monitoring service, which tracks and reports shipments and storage of crude oil, said in a Twitter post on Thursday that they have a visual confirmation the hijacked Greek Suezmax tanker Prudent Warrior is in the anchorage of Bandar Abbas in the southern Hormozgan province and the other Suezmax vessel, the Delta Poseidon is being held north of Larak island near the Strait of Hormuz.

The Iranian Revolutionary Guards' navy seized the two vessels during helicopter-launched raids on May 27 in the Persian Gulf, a week after the confiscation of Iranian oil from a tanker held off the Greek coast and its transfer to the US. 

Criticized by many former and current officials as well US congresspeople for a lenient Tehran diplomacy that has led to the increase of the Islamic Republic’s oil revenues, President Joe Biden’s administration has apparently stepped up its effort to put pressure on Iran’s crude exports, which have been sanctioned since the former President Donald Trump abandoned the nuclear deal in 2018.

The Vienna talks to restore the 2015 nuclear deal have stalled mainly because of Iran’s demand for the US to remove the Revolutionary Guard (IRGC) from its terrorism list (FTO) and the recent missile attacks have shed more doubts whether Washington would take such a step.