Three masked men attacked a man and a woman in their apartment in Mönchengladbach with a hammer and a chain.
First of all, they knocked on the door of an apartment in an apartment building on Monday evening, the police reported on Tuesday.
According to the owner of the apartment, they posed as police officers.
When the 29-year-old opened, he was hit directly in the head with a hammer.
Mönchengladbach - A 29-year-old - also the owner of the apartment - was reportedly beaten with a metal chain.
Both were injured.
The perpetrators then took away electronic equipment.
dpa