A British tanker has reportedly been seized in Iranian waters in mysterious circumstances.
The Ministry of Defence says it is urgently seeking information about the unfolding incident.
According to reports the Stena Impero took a sudden turn in the Gulf, having been headed to Saudi Arabia.
The company that owns the vessel said it was approached by “unidentified small crafts” and a helicopter in the Strait of Hormuz.
In a statement Stena Impero said: “We are presently unable to contact the vessel which is now heading north towards Iran.
“There are 23 seafarers aboard. There have been no reported injuries and their safety is of primary concern to both owners and managers.”
The company said the tanker was in international waters when it was approached.
An MOD spokesman said: “We are urgently seeking further information and assessing the situation following reports of an incident in the Gulf.”
The company’s statement continues: “Northern Marine Management has not been able to establish contact directly with the vessel since it was notified of the incident at approximately 1600 Today, 19th July 2019.
“We are in close contact with UK government authorities.”