Russia detained a Greek-owned oil tanker on Sunday after it left an Estonian Baltic Sea port, the Estonian Foreign Ministry said, adding it had alerted NATO allies to the incident.

Russia detained the Liberian-flagged oil tanker Green Admire, which left the port of Sillamae and was sailing through Russian territorial waters, Estonian Public Broadcasting said Sunday, citing the Estonian Department of Transport.

Russia detained a Greek oil tanker after it left a port in Estonia, while sailing on a pre-agreed route in Russian territorial waters.