The continued detention of one of its tankers in Iran is "unacceptable and unjustifiable", Stena Bulk said in a statement Tuesday.
The Swedish shipowner said crewmembers aboard the 50,000-dwt Stena Impero (built 2018) are fine as its arrest stretches into a third week, but the crew wonders how long they will have to stay in the Islamic republic.
"We are maintaining limited communication with the crew aboard and although they remain in good health considering the circumstances, we continue to be concerned about their welfare given the amount of time they have been in confinement," Stena Bulk chief executive Erik Hanell said in a statement.
The company said the Finnish consulate met 3 August with a Latvian crewmember and said the crew were healthy but "the duration of their confinement remains of considerable concern".
On 19 July, the Iranian Revolutionary Guard seized the UK-flagged Stena Impero as it sailed near the Strait of Hormuz. The guard was said to have landed commandos on the ship from a helicopter and accused it of "violating international regulations."
The ship has sat in Bander Abbas since.
The arrest came weeks after the British seizure of a Ukrainian-flagged tanker allegedly en route to Syria in Gibraltar and roughly a month after the US blamed Iran for attacks on two tankers.
Since, tensions in the region — through which a considerable amount of all the world's seaborne oil travels — have further escalated with Iran seizing another ship and the UK joining a US-lead coalition to protect commercial shipping.
Stena Impero has argued for access to the Stena Impero, but has not been given an official answer from Iranian authorities.
