VOLODYMYR Zelensky has warned Vladimir Putin's latest drone incursion into another Nato country is an "obvious expansion of war".

The nailbiting escalation came as Russia breached Romanian airspace during another attack on Ukraine - forcing Nato to scramble fighter jets.

It comes after Putin flew drones into Polish airspace on Wednesday, forcing Warsaw to shoot them down and trigger Nato's Article 4 - one below the threshold of war.

The unprecedented move marked the first time a member of the defence alliance fired a shot since the start of Russia 's invasion of Ukraine .

On Saturday, Romania 's defence ministry confirmed a drone had entered across their border after Moscow launched an onslaught on neighbouring Ukraine .

War hero Zelensky said the incursion was not

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