“A soldier of the Islamic State” was responsible for a knife-wielding rampage through Hamburg, Germany, two weeks ago, in which two teenagers were attacked and one killed.

The attacker approached his 16-year old victim from behind as he sat on a bridge with his girlfriend. He stabbing the boy multiple times and pushed the 15-year-old girl into the water.

The terrorist, described as 23 to 25 years old, escaped into the night, but the girl managed to get out of the water and alert emergency services. Her boyfriend, know as Victor, died a short time later from multiple stab wounds, Bild reports.

On Saturday, the Islamic State news agency Amaq claimed responsibility for the murder.

“A soldier of the Islamic State stabbed two individuals in Hamburg city on the 16th of this month,” Amaq said, according to Reuters. “He carried out the operation in response to calls to target the citizens of coalition countries.”

An der #Hauptwache in #Frankfurt kam es zu einer Messerstecherei. Deswegen sind so viele Kollegen und Rettungskräften dort. *ds — Polizei Frankfurt (@Polizei_Ffm) October 29, 2016

The announcement from Islamic State comes the day after four people were injured in a stabbing attack at a subway station in downtown Frankfurt this Friday.

“In the #Hauptwache [district] in #Frankfurt there was a knife fight. There are many colleagues and rescue workers there”, Tweeted Frankfurt Police force at 5.20 last night.

The knifeman remains on the run, and police are investigating to find out how many people were involved. No details on the ages and genders of those injured have emerged, the Telegraph reports.

Germany has experienced a series of Islamist terror attacks linked to migrants and ‘refugees’ since Chancellor Angela Merkel opened the nation’s borders to more than a million migrants from the Middle East last year.

On September 18th 2015, an Iraqi asylum seeker linked to al-Qaeda was shot dead after stabbing a German policewoman in the neck during an attack in west Berlin.

In February of this year, another police officer was severely injured by a 15-year old girl of Moroccan origin who was acting “on behalf of the Islamic State”.

Four months later, in July, an Afghan ‘refugee’ went on an Axe wielding rampage on a train near the city of Würzburg, leaving four people injured before being shot dead by police.

And then, just five days later, a 27-year-old Syrian ‘refugee’ pledged allegiance to Islamic State injured more than a dozen Germans in a suicide-bomb attack on a bar.