At least seven people were wounded, two of them seriously, when a 19-year-old student attacked people inside a vocational school complex in Ostrołęka, Poland, on Wednesday morning, regional police and prosecutors said. Officers arrested the suspect minutes later near the city’s municipal beach, and local authorities closed the campus while tightening access rules at other public schools.
What police and prosecutors say happened
The incident unfolded shortly before noon at Zespół Szkół Zawodowych nr 4, a vocational school cluster in Ostrołęka, a city of about 50,000 people in Mazovia province north of Warsaw. Sub-inspector Katarzyna Kucharska, a spokeswoman for the Mazovia provincial police command in Radom, told reporters that seven people suffered injuries and that most of the wounded were students. One teacher was also hurt, she said.
Prosecutor Elżbieta Łukasiewicz, speaking for the district prosecutor’s office in Ostrołęka, told Polish media that the suspect entered the building with a dangerous tool and attacked students and staff. She identified the detained man as Jakub Z., a 19-year-old enrolled at the school. His motive was not immediately known, she said.
Police said the suspect was taken into custody about 15 minutes after the attack in the area of the city beach. He remained in custody Wednesday as investigators carried out procedural steps. Polish outlets including TVN24 and Wirtualna Polska reported that a medical helicopter from the Lotnicze Pogotowie Ratunkowe air ambulance service was involved in moving the injured for treatment.
Medical response and city security steps
Staff at the Mazovian Specialist Hospital in Ostrołęka told local radio that all of the injured were being treated on site Wednesday and that none needed transfer to other facilities at that stage. The hospital’s emergency department secretary said care was ongoing throughout the afternoon.
Ostrołęka Mayor Paweł Niewiadomski confirmed in a written statement that a serious incident involving a sharp tool had occurred at the vocational school and that the situation was under control after the arrest. He ordered ZSZ nr 4 closed for the day and directed that visitors be barred from other city-run schools as a precaution, saying the priority was student safety and support for those hurt.
Polish leaders routinely review school security after campus violence, and Wednesday’s attack drew immediate attention from national broadcasters because it followed other high-profile assaults in European schools in recent years. Authorities did not immediately describe any wider threat beyond the detained student.
What investigators face next
Prosecutors will now determine precise charges and whether additional security footage, witness accounts, or mental-health evaluations shape the case. Polish law treats attacks with bladed weapons in public institutions as serious violent crimes, and the suspect’s age means he will be handled in the adult criminal system.
Parents gathered outside the school perimeter as police tape went up, and counseling teams were expected on campus even while classes remained suspended. National education officials had not issued a nationwide directive by mid-afternoon, leaving Ostrołęka officials to manage the immediate fallout.
For families across Mazovia, the attack was a reminder that vocational campuses—often shared by older teenagers and young adults—face the same security pressures as larger urban high schools. Police asked anyone with video from the area to come forward as they reconstruct the minutes between the first emergency call and the beach arrest.