The bombers were "a hazard to all other aviation," the Ministry of Defence said.
The exercises are taking place as tensions rise between Russia and Ukraine in the Sea of Azov.
The drill involves all branches of the military, as well as deployments from China and Mongolia.
Russia's foreign minister gave his thoughts on the odds of an armed clash and said Russian meddling claims show Washington does not "respect the American choice at all."
Russia will mobilize up to 300,000 troops, more than 1,000 aircraft, around 80 warships and some 36,000 vehicles.
Russian media have worked to promote tensions between Turkey and NATO, encouraged Ankara to support Russian actions in Eurasia and the Middle East and influenced the country's internal political development to transform it into a "more compliant partner."
Given President Donald Trump's animosity toward both John McCain and NATO, such a move could be seen as a challenge to the White House.
The Air Force is pre-positioning the deployable air base system throughout Europe, so they can be pushed out rapidly in the face of any threat.
Russian President Vladimir Putin said U.S.-led NATO was refusing to discuss easing increasing tensions. NATO disputed this.
German Foreign Minister Heiko Maas said Europe must create a new system for financial transactions that excludes the U.S. in order to help Iran.
It is "highly likely" that the U.S. will send forces on a permanent basis, the Polish defense minister said.
Analysts warn that Turkey's feud with the United States could motivate Ankara to start looking for new friends, and Russia appears happy to fill in the gap.
The Spanish Air Force fighter jet was flying alongside one Spanish and two French aircraft when it accidentally launched an air-to-air missile above Estonia.
NATO and Georgian troops are currently conducting military training exercises.
What Romanian Defense Minister Mihai Fifor called "a misunderstanding," Russian diplomat Pavel Alekseenko called "a spontaneous truth."
The president did not clarify which U.S. allies he considers to be ruled by dictators a month after Defense Secretary Mattis hailed NATO as union of "democratic nations."
He forces foreign policy and political establishments to re-evaluate positions that have been taken for granted—then says something imbecilic.
Trump must decide between chaos and leadership.
"Strengthening Russia as an independent international player does not give rest to our NATO colleagues," Russian Defense Minister Sergei Shoigu said.
"This trend clearly indicates that NATO countries are trying in every possible way to prevent Russia from emerging as a geopolitical competitor."
Greece has expelled several Russian diplomats for their alleged interference in the country's foreign policy.