The navy has seized the tanker near the coast of western Libya, the Turkish Anadolu news agency said citing a statement of the navy.
The media outlet added that there were eight crew members on board the tanker when it was seized by the navy.
At the moment, the eastern part of the crisis-torn state is governed by its parliament, with headquarters in the city of Tobruk. The parliament is backed by the Libyan National Army, which is engaged in struggle against militants. At the same time, the UN-backed GNA, headed by Fayez Sarraj, operates in the country's west and is headquartered in Tripoli.
The crisis in oil-rich Libya has resulted in the intensification of oil smuggling activities. In April 2017, the Libyan navy seized two tankers under the Ukrainian and Congolese flags carrying about 4,500 tonnes of smuggled oil.