Estonia tried to detain Russian "shadow fleet" tanker as Su-35 violated airspace – media. VIDEO Estonian authorities have revealed details of an incident that occurred on 13 May, when a Russian Su-35 fighter jet violated the country’s airspace. Russia briefly scrambled an aircraft as the Estonian Navy attempted to detain a "shadow fleet" oil tanker. 11 505 47 Previously in trend: Russia’s shadow fleet Russian aircraft airspace violations