Four Russian fighter jets entered Swedish airspace on Wednesday which has been branded as “unprofessional and irresponsible” and the action is being taken “very seriously.”

DefenceGeek Twitter account tweeted, “Four #Russian fast-jets breached #Swedish Airspace today.

“The jets, comprising 2x Su-27 ‘Flanker’ and 2x Su-24 ‘Fencer’ jets, actually entered Swedish airspace according to reports (rather than just entering the ADIZ).”

Force Commander Edstrom of the Swedish Armed Forces confirmed on Wednesday that four Russian fighter jets violated Swedish airspace east of Gotland.

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The Force Commander added, “This shows that our preparedness is good.

“We were on-site to ensure territorial integrity and Sweden’s borders. We have full control of the situation.

“Two Russian SU 27s and two Russian SU 24s violated Swedish airspace.

“The violation was short-lived and took place east of Gotland, across the sea.

“In light of the current situation, we take the incident very seriously.

“It is an unprofessional and irresponsible action on the part of Russia, says the air force chief.”

On Saturday Finland and Sweden were threatened by Russia with “serious military and political repercussions” should they decide to join NATO.

Moscow warned that NATO has expanded too far eastwards and Russia fear this poses a national threat to their security.

This week experts have warned the Russian President will not stop at Ukraine as over the weekend Vladimir Putin gave a warning to Finland and Sweden.

Fiona Hill, a former senior director for Europe and Russia at the US National Security Council, told Politico: “Of course he won’t.

“Ukraine has become the front line in a struggle, not just for which countries can or cannot be in NATO, or between democracies and autocracies, but in a struggle for maintaining a rules-based system in which the things that countries want are not taken by force.

“Every country in the world should be paying close attention to this.”