A 33-year-old African national from Niger Republic is suspected of killing his former wife and child in Germany on Thursday, April 12.
According to German media, the fatal knife attack took place in Hamburg’s busy Jungfernstieg U-bahn station.
The suspect, identified as Mado Mourtala, from Niger, has since turned himself in and has been arrested.
"The crime was very, very terrible in its execution, very targeted and very, very extreme," said police spokesman Timo Zill.
The motive for the crime is still unclear, states the MOPO. Police believe a crime of passion was committed. A homicide team has since taken over the investigation.
The area around the Jungfernstieg underground station has been cordoned off over a wide area.
Some S-Bahn trains have been affected as a result of the incident and in the vicinity of the scene there are traffic obstructions due to road.