A reporter from the English language Turkish Newspaper Today’s Zaman first alerted the world to this story a little over 2 hrs ago:

Mahir Zeynalov ‏@MahirZeynalov 2h2 hours ago
“Turkey seizes four Russian ship in Black Sea in one of first moves to retailate against Russian aggression.”

And now the Azerbaijani news agency Trend has their version of the story:

“Four Russian ships blocked in Turkish port”

By Rufiz Hafizoglu – Trend News Agency Azerbaijan: en.trend.az…

“Four Russian ships have been blocked in the Turkish port of Samsun, the Turkish Haber7 newspaper reported Dec.5.”

“No details are yet available on the issue,” according to the newspaper.

“Relations between Russia and Turkey have deteriorated after Turkish Air Force jets shot down the Russian SU-24 bomber when it entered Turkish airspace Nov. 24.

The anti-Turkish statements made by Russian authorities are similar to the spirit of former USSR, Turkish Prime Minister Ahmet Davutoglu said earlier.

Turkey hoped that Russia has got rid of the USSR’s propaganda rhetoric, but facts show that it is not exactly that way, he said.

No one believes in the anti-Turkish propaganda but Russian authorities, said the prime minister.”

Link to azerbaijan Trend news en.trend.az…

See map at link for location of the detention: johngaltfla.com…

I would need to do some research on the sources, but feel free to add anything you might find; This is only a couple of hours old..