Estonian officials say a Russian military aircraft violated Estonian airspace over the Baltic Sea this week.

Foreign Ministry spokeswoman Mari-Liis Valter says the ministry summoned the Russian ambassador Friday to formally protest the incursion.

Valter says a Russian Antonov An-26 aircraft strayed from its reported flight plan Monday and entered Estonian airspace without permission near the island of Vaindloo. She says the incursion lasted for less than a minute.

The island is near a corridor Russian military planes fly through to get from the St. Petersburg area to the Russian outpost of Kaliningrad.

The nations around the Baltic Sea have reported repeated airspace violations by Russian aircraft in recent years amid increasing military activity by both NATO and Russian forces in the region.