The incident occurred overnight from February 2 to 3. As reported by eluban.pl:
Just before midnight, the duty officer at the Lubań police station received a report of a disturbance in Świeradów-Zdrój.
It turned out that during a heavily alcohol-fueled party, a 27-year-old man was stabbed in the abdomen with a sharp object. He was taken to hospital.
Two people were detained: a 43-year-old and a 47-year-old man. Both were intoxicated.
Police are determining the causes and circumstances of the incident.