A man in Warsaw allegedly attacked two Ukrainian men with a knife, prompting an immediate police response. Police detained a suspect after the assault, according to the report. Officers moved in after the knife attack and arrested the man suspected of carrying it out. The details of the incident and any injuries are not included in the available information. The suspect remains in police custody while the case is handled through the criminal investigation process. The investigation continues as authorities work to establish what happened and determine the next legal steps.