Two people injured in attack in Polish school, 15-year old detained, minister says

Two ​adults ‌were ‌injured ⁠in ‌an attack "with ‌a ⁠sharp object" in ​a Polish ‌school and ⁠a 15-year-old ​was ​detained, Interior Minister Marcin ‌Kierwinski said ‌on ⁠Thursday, ⁠adding ⁠a janitor ​w...