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A major police operation was underway after the suspect stormed Dubronovik restaurant in Saarbruecken, near the French border.

He is understood to have run into the building yelling "all out" while covered in blood at around 9.15am Sunday.

Panicked staff and customers fled.

No hostages were confirmed.

(Image: NC)

Roads surrounding the restaurant were cordoned off and armed police stationed around the entrance.

After several hours of negotiations, police entered the restaurant and found him in the basement, according to German paper Bild.

He was rushed to hospital for his injuries – believed to be self inflicted.

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Local reports named him as the son-in-law of the restaurant’s owner.

He is originally from Macedonia, but has lived in Germany for a long time.

Germany is on high alert after several horrific attacks in the past few weeks.

A teen went on an axe rampage on a train in Wurzburg on July 19 – wounding five.

Three days later a Munich teen lured friends to a McDonald's through Facebook before entering the restaurant and opening fire – killing nine before turning the gun on himself.

And on July 24 a suicide bomber detonated an explosive outside a bar in Ansbach.