Russian military jets have violated Estonian airspace, officials have said.

In a statement, the Estonian government said the incident involved three Russian MiG-31 fighter jets that flew over the country for a total of 12 minutes without permission.

The country's defence minister called the incident "unprecedentedly brutal".

It comes after Romania said a drone breached its airspace during a Russian attack on neighbouring Ukraine on Sunday.

Poland also reported an "unprecedented violation" of its airspace by Russia last week.

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