Greek authorities say an unidentified warplane has bombed a Greek-owned tanker ship in the eastern Libyan port of Darna, killing two crew members and injuring two more.

Citing a briefing by the ship's managers, the Merchant Marine Ministry says the Liberian-flagged Araevo was attacked Sunday while it was anchored in the harbor.

Darna is a base for Islamic extremists, who have pledged allegiance to the Islamic State group. Widespread militia violence has plunged Libya into chaos less than four years after a NATO-backed uprising toppled and killed longtime dictator Moammar Gadhafi.

The Araevo's crew of 26 consisted of 21 Filipinos, three Greeks and two Romanians.

The ministry said Monday the vessel had 12,600 metric tons of fuel on board. Damage is still being assessed.