Romanian President Nicusor Dan blamed Russia for an attack on a merchant vessel in the Black Sea on Friday morning.

A drone strike sank the merchant ship, with 13 Ukrainian and Azeri crew members on board, near Romanian territorial waters.

The attack killed at least 1 sailor, and three others were still missing, according to Dan.

Nine of the 13 crew members have been rescued.

Attack on merchant shipping on the rise in the Black Sea: What to know

The drone strike on the ship, called Khoryv, is believed to be the fourth merchant vessel to have been attacked off the coast of Romania this month.

Two weeks ago, two merchant vessels were also set ablaze in the western Black Sea, which is a vital shipping corridor heavily used by Ukraine.

One of those ships was inside Romanian territorial waters.…