At around 3:15 a.m., residents in southern Estonia – Tartu, Jõgeva, Viljandi, Valga, Võru and Põlva counties – were told there was a "potential air threat" and to "seek shelter if you spot a drone."

This was extended to the eastern Lääne-Viru and Ida-Viru counties at around 3:30 a.m.

The warnings were lifted at around 6:30 a.m.

A spokesperson from the Estonian Defence Forces told ERR that NATO fighter jets were scrambled in response.

A resident from Kohtla-Järve in Ida-Viru County told ERR they had heard several jets flying over the area at short intervals.

The Governor of Russia's Leningrad Oblast, Aleksandr Drozdenko, said a drone attack has caused a fire in the port area of Ust-Luga by the Baltic Sea, around 30 kilometers from Estonia, injuring three workers, Reuters news agency reported.

Ust-Luga is a major oil, oil products and grain export outlet, along with other commodities. The facility has been sanctioned by the European Union, Canada, the United Kingdom, the United States, and Switzerland for its role in Russia's war against Ukraine.

Ust-Luga is one of Russia's ports "used to transport Russian crude oil by using the shadow fleet and other irregular and high-risk shipping practices," according to the European Commission's Directorate-General for Enlargement and Eastern Neighbourhood.

Several alerts have been issued this year in Estonia as Ukraine has increased its attacks on Russia's oil industry. The most recent was issued in September.

Drone parts and debris have previously been found in all three Baltic countries and Finland after Ukrainian attacks on Russian infrastructure.

Latvia and Lithuania also issued drone warnings on Tuesday evening and Wednesday morning.

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