A Russian Antonov An-26 entered Estonian airspace without permission near Vaindloo island at 10:29 a.m. on Monday, military spokespeople in Tallinn said.

The plane spent less than a minute in Estonian airspace. Its transponder was on, and it had submitted a flight plan according to which it was to fly in international airspace. The plane was not in radio contact with Estonian Air Navigation Services at the time of the incursion.

A representative of the Russian embassy was summoned to the Foreign Ministry and handed a protest note.

This was the second airspace violation by a Russian aircraft this year. A Russian Mi-8 helicopter entered Estonian airspace without permission near the northeastern border guard base of Vasknarva on Feb. 18. On the next day the Foreign Ministry summoned the ambassador of Russia and handed him a protest note.

In 2015, aircraft of the Russian armed forces violated Estonian airspace on three occasions. In 2014, eight such incidents were recorded. Most of them happened near the island of Vaindloo in the Gulf of Finland.