The Lithuanian military confirmed on Thursday that two Russian military aircraft briefly entered the airspace of NATO member Lithuania for a period of 18 seconds. Following this incursion, Spanish jets, operating as part of NATO's Baltic Air Policing mission, were dispatched to intercept the planes.
Source: https://www.livemint.com/news/world/russian-military-aircraft-breach-nato-member-lithuanias-airspace-for-18-sec-spain-scrambles-jets-11761239310240.html