“Woman injures three people in third Poland school knife attack in a week”
Key points from BBC
- A 21-year-old woman was arrested after injuring three people at a Warsaw school.
- The victims include a 17-year-old girl and two women aged 17 and 24.
- Police say the attacker used a dangerous object and appeared not to know the victims.
- Security at Polish schools has been tightened after multiple knife attacks in early October.
- authorities reported earlier incidents involved a 19-year-old student and a 37-year-old caretaker killed.