The top U.S. Army commander in Europe complained that Russia is being too secretive about upcoming large-scale military drills.
The incursion lasted around a minute, Estonia’s armed forces reported.
Estonia’s Ministry of Defence claims Russian jets violated its airspace four times in 2016.
It was the first time British fighter jets have responded since the Typhoons were deployed in late April.
Maardu marked May 9 with a ceremony honouring Soviet troops.
Officials in the Baltics are calling for higher NATO vigilance as Russia steps up drills.
Former CAPO agent Uno Puusepp has been unveiled as a double agent for Russia's FSB
The tiny nation with a 'government start-up' mentality will be the first to offer e-residency in a bid to raise its profile and attract foreign investment
Obama urged diplomacy but said NATO and the U.S. would stand with Estonia against any possible Russian aggression