A 21-year-old is said to have stabbed a 63-year-old with a knife in an apartment building in Walddorfhäslach (Reutlingen district).
The victim was taken to hospital with serious injuries after the attack on Thursday, police and prosecutors announced on Friday.
The 63-year-old was therefore operated on and is out of danger to life.
Walddorfhäslach - According to the investigators' previous findings, the young man is said to have rang the 63-year-old's doorbell in the early evening.
When he opened the apartment door, the masked 21-year-old is said to have stabbed suddenly with a knife.
When witnesses rushed to help, the attacker fled.
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As the police announced on Monday, there should have been an argument on Sunday lunchtime in front of a bar between the 32-year-old and a 25-year-old.
The 25-year-old stabbed the 32-year-old in the neck with a knife.
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The men followed the tractor with their car, slowed it down and confronted the farmer.
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Am Teufelsberg: 17-year-old seriously injured by stings
In a crowd of young people at night on Berlin's Teufelsberg, a youngster was seriously injured by knife stabs in the back and head.
The unknown perpetrator cut and stabbed another young man in the hand, as the police announced on Sunday.
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There is probably a connection between the two men, said a police spokesman.
However, he did not want to disclose any further details at first.
The motive is still the subject of the investigation.
The 21-year-old was provisionally arrested a few hours after the attack as part of the manhunt in the urban area of Walddorfhäslach.
The alleged murder weapon has not yet been found.
The 21-year-old German, already known to the police for various offenses, is said to be brought before the judge on suspicion of attempted manslaughter.
dpa
