Teen wearing helmet camera kills worker at Polish school amid fears of copycat attacks

A 15-year-old boy wielding a knife and wearing a helmet-mounted camera attacked a Polish primary school he used to attend, allegedly killing one employee and wounding two others in the country's second school stabbing in two days.

Authorities are investigating whether the attacks are connected to an online challenge encouraging teenagers to kill as many people as possible.

Police said a 37-year-old woman who worked as a caretaker died in the Thursday morning attack at the school in Leszczydol-Nowiny, northeast of Warsaw.