Shipping through Turkey’s Bosphorus Strait was suspended after a freighter collided with a coast guard vessel.
Istanbul authorities said six people were rescued in the August 17 incident.
There was no word on how long the strategically important waterway would be closed.
About 3 percent of global oil supplies pass through the strait each year.
It is also a key waterway for grain shipments, connecting the Black Sea to the Mediterranean.
Based on reporting by Reuters