Estonia said the jets entered its territory over the Gulf of Finland on Friday morning and remained for about 12 minutes before leaving near the island of Hiiumaa.
The country has requested NATO consultations under Article 4 of the Washington Treaty, which provides for talks when a member feels its security is threatened.
"This latest case was very brutal because it lasted 12 minutes. It shows how Russia is accelerating and provoking from every side," Kosiniak-Kamysz told reporters in the southeastern town of Boguchwała, noting that Estonian airspace had been violated around 40 times in recent years.
NATO’s North Atlantic Council is set to meet on Tuesday to discuss the incident, two officials told Reuters, while Estonia’s foreign ministry said the UN Security Council will hold an emergency session on Monday.
Russia’s defence ministry denied any violation, saying its jets flew over neutral waters.
Western officials say Moscow has been testing the alliance’s readiness, pointing to the latest incident and to some 20 Russian drones that crossed into Polish airspace earlier this month.
Some European leaders, including Czech President Petr Pavel, have suggested NATO should consider downing Russian aircraft if they continue to trespass.
Britain’s Deputy Prime Minister David Lammy told Sky News the violation was a "very serious breach" and potentially “a serious escalation”.
Kosiniak-Kamysz underlined that NATO’s new Eastern Sentry mission, involving forces from France, Germany, the Netherlands and the Czech Republic, is now active in Poland’s eastern regions.
British helicopters, he said, recently joined patrols of Polish skies.
"These [Russia's ed.] provocations will continue and they must be met with a response. We also need to build the strength and resilience of society so as not to fall for disinformation," Kosiniak-Kamysz said.
(ał)
Source: PAP, Reuters