The UK has made moves to stop a cargo vessel allegedly carrying refurbished Russian-made attack helicopters from completing its journey to Syria.
The MV Alaed had its insurance withdrawn by The Standard Club in London while it was about 50 miles (80.4km) off Scotland’s north coast.
The insurer said it had sought more information on the boat’s cargo.
Withdrawal of insurance prevents the MV Alaed from sailing until its owner can secure new cover.
It is thought that the vessel has stopped off the Western Isles.
The Foreign and Commonwealth Office (FCO) said it was unclear where the vessel would now go.