Estonia earlier said that Moscow had briefly sent a fighter jet into NATO airspace over the Baltic Sea during an attempt to stop a Russian-bound oil tanker thought to be part of a "shadow fleet" defying Western sanctions on Moscow.

Asked about the matter at her weekly news briefing, Foreign Ministry Spokesperson, Maria Zakharova said Moscow was closely monitoring events in the Baltic and would react to what she called illegal actions by NATO vessels, if they caused risks.

--Reuters--