Analysis-Russian raid off Turkey's coast tests Erdogan's resolve

FILE PHOTO: The Joint Coordination Centre officials sail through cargo ship Mehmet Bey as she waits to pass the Bosphorus strait off the shores of Yenikapi during a misty morning in Istanbul, Turkey, October 31, 2022. REUTERS/Umit Bektas/File Photo

ISTANBUL (Reuters) - Russia's raid on a ship just off Turkey's coast brings the fallout from the Ukraine war to another NATO frontier and raises the stakes as Ankara seeks to coax Moscow back to a grain-export deal that would restore some calm to the Black Sea.

Armed marines raided the Turkish-based vessel via helicopter on Sunday some 60 km (37 miles) off Turkey's northwest coast, in international waters but near Istanbul, in what Moscow called an inspection before it sailed on to Ukraine.