A Boeing E-3A "Sentry" Airborne Early Warning (AEW) and Control plane designated "NATO 11" entered the air space of Belarus today as seen on the FlightRadar24 map above.
This does ***not*** appear to be a Flight Radar error.
The Boeing E-3 Sentry is an American airborne early warning and control (AEW&C) aircraft developed by Boeing. E-3s are commonly known as AWACS (Airborne Warning and Control System).
Derived from the Boeing 707 airliner, it provides all-weather surveillance, command, control, and communications, and is used by the United States Air Force, NATO, French Air and Space Force, Royal Saudi Air Force and Chilean Air Force.
The E-3 has a distinctive rotating radar dome (rotodome) above the fuselage. Production ended in 1992 after 68 aircraft had been built.
Awaiting more information or official confirmation.
UPDATE:
This has to be deliberate fuckery, it's possible someone is using Electronic Warfare to make a plane appear somewhere it isn't.
All record of this apparent incursion are no longer showing on FlightRadar24.
Whether by accident or design, for this to happen on the eve of the Vilnius summit seems very suspect indeed.