MOSCOW, April 13. /TASS/. A Black Sea Fleet frigate escorted tankers carrying Russian oil through the English Channel last week, Russian presidential aide and head of the country’s Maritime Board Nikolay Patrushev said in an interview with Rossiyskaya Gazeta.

He also said that Ukraine, with NATO coordination and support, is attempting to deliberately damage Russia’s non-military maritime infrastructure and merchant fleet.

TASS has compiled the key statements made by the presidential aide.

"The risks of unlawful acts and terrorist attacks against ships sailing from or toward Russian ports are increasing."

With NATO coordination and support, Ukraine is attempting to damage the Russian merchant fleet: "Ukrainian special services, with coordination and intelligence support from NATO countries, are deliberately inflicting damage on non-military maritime infrastructure and our country’s merchant fleet."