![33 year old suspect initially ran off but then phoned police who arrested him photo file 33 year old suspect initially ran off but then phoned police who arrested him photo file](https://i.tribune.com.pk/media/images/1684033-murderknife-1523545322/1684033-murderknife-1523545322.jpg)
The bloody knife killings took place mid-morning in the busiest subway station of Hamburg, Germany's second-biggest city.
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"The crime was very, very terrible in its execution, very targeted and very, very extreme," said police spokesperson Timo Zill.
"We currently assume it was a crime of passion."
The 33-year-old suspect initially ran off but then phoned police, who arrested him inside the Jungfernstieg underground station.
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Police said the child died immediately in the attack around 0850 GMT and the 34-year-old woman succumbed to her injuries in hospital.
Police and firefighters responded in large numbers, and trauma counselling was offered to witnesses and emergency responders.
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