A Nato military plane on Wednesday approached the plane of Russian Defence Minister Sergei Shoigu above the Baltic Sea, Russian news agencies reported, the third such encounter in three days. A Nato fighter jet tried to approach Mr Shoigu's plane but a Russian escort plane intervened to defend it, Interfax news agency reported, citing journalists accompanying the minister. The escort plane, a Sukhoi SU-27, demonstrated it was armed by rocking its wings, after which the Nato plane flew off, Interfax reported. Nato insisted the crew's actions were "routine" to identify the plane while "maintaining a safe distance at all times" and then break away. Russian state television aired defence ministry footage of the incident, reporting that it took place over neutral waters. Nato and national air forces…