US President Donald Trump has said he would defend Poland and the Baltic states in case of an escalation from Russia, following Moscow's incursion into Estonia's airspace.
Asked whether he would help defend the EU members if Russia intensifies hostilities, Mr Trump told reporters: "Yeah, I would. I would."
Estonia has requested an emergency meeting of the UN Security Council tomorrow following Friday's incursion.
Three Russian MiG-31 fighters violated Estonian airspace over the Gulf of Finland, triggering complaints of a dangerous new provocation from the European Union and NATO but a denial from Moscow.
Italian F-35 fighters attached to NATO's air defense support mission in the Baltic states, along with Swedish and Finnish aircraft, were scrambled to intercept the Russian jets and warn them off.
"On September 22... the United Nations Security Council will convene an emergency meeting in response to Russia's brazen violation of Estonian airspace last Friday," a statement from the Estonian ministry said.
It marks the first time in 34 years of Estonia's membership in the UN that the EU and NATO member nation - a staunch supporter of Ukraine - has officially requested an emergency Security Council meeting.
Estonian Foreign Minister Margus Tsahkna said the violation is "part of a broader pattern of escalation by Russia, both regionally and globally", following violations of Polish and Romanian airspace earlier this month.
"This behavior requires an international response," Mr Tsahkna said.
Asked whether he had been briefed on the situation in Estonia, Mr Trump answered in the affirmative and added: "We don't like it."
His statement came about two weeks after some 17 Russian drones violated Polish airspace, in incident Mr Trump then sought to downplay.
"It could have been a mistake," he told journalists on 11 September.
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Russian military plane entered airspace over Baltic Sea, Germany's air force says
Meanwhile, Germany's air force this morning sent two Eurofighters to track a Russian IL-20m military aircraft that had entered neutral airspace over the Baltic Sea, it said, before handing the escort over to NATO partners in Sweden.
"Once again, our quick reaction alert force, consisting of two Eurofighters, was tasked by NATO with investigating an unidentified aircraft without a flight plan or radio contact in international airspace," Germany's air force said in a statement.
"It was a Russian IL-20M reconnaissance aircraft. After visual identification, we handed over escort duties for the aircraft to our Swedish NATO partners and returned to Rostock-Laage."
