ISTANBUL, Dec 2 (Reuters) - A Russian-flagged tanker

loaded with sunflower oil reported a drone attack off the

Turkish coast on Tuesday, but its 13 crew members were unharmed,

Turkey's maritime authority and the Tribeca shipping agency

said.

The vessel, MIDVOLGA-2, reported coming under attack 80

miles (130 km) off the Turkish coast but did not make a request

for assistance and was proceeding towards Turkey's Sinop port,

Turkey's Maritime Affairs Directorate said on X.

Tribeca said the ship had been attacked by a drone. It was

not immediately clear who had attacked the ship and Turkey's

Maritime Affairs Directorate did not provide additional details.

The maritime authority said the ship was sailing from Russia

to Georgia, while Tribeca said it was bound for Mersin. Both

said the ship was now en route to Sinop without assistance.

"The necessary messages were conveyed to the relevant

parties, including Ukrainian authorities," a Turkish official

said when asked for comment, but gave no further details.

Turkish President Tayyip Erdogan said on Monday that attacks

on commercial ships in the Black Sea were unacceptable, issuing

a warning to "all related sides".

Ukrainian naval drones last week hit two tankers sanctioned

by Kyiv and some of its Western allies in the Black Sea as they

headed to a Russian port to load oil destined for foreign

markets, as it attempts to pile pressure on Russia's oil sector.

NATO member Turkey has maintained cordial ties with Kyiv

and Moscow throughout the war. It has provided military support

to Ukraine, but refused to join Western sanctions on Moscow.

It has previously hosted three rounds of peace talks between

the warring sides in Istanbul and repeatedly offered to host a

leaders' meeting, saying an end to the war must be achieved now.

Ankara has also demanded navigational safety in the Black

Sea, where it shares maritime borders with Russia and Ukraine.