Three people have been injured in Poland following a knife attack by a woman at a school, according to reporting by BBC News. The incident represents the third violent assault at an educational facility in the country within the span of one week.

The attack comes as Polish police were already on high alert and deployed to schools nationwide. Authorities had increased security measures following two separate violent incidents that occurred over two consecutive days earlier in the week.

In those prior attacks, a female school caretaker was killed and several other people sustained injuries, prompting deep concern from law enforcement and school officials across Poland.

Readers can find the full original report on this story at BBC News.