Loud voices from the apartment and blood in the stairwell.
Noise from an apartment in a multi-unit building is interpreted as ongoing brawl and there are also bloodstains in the staircase.
When the police enter the relevant apartment, two people, a man and a woman, both in their 40s, are found.
The man is apprehended for unlawful threats, narcotics offense (personal use and possession) and vandalism.
The woman has no physical injuries requiring hospital care.
Update at 16:39
The man apprehended is also suspected of assault.