Police in Poland have detained 76 people and checked nearly 50,000 schools nationwide as part of efforts to prevent further violence following two school attacks earlier in the week.

Police in Poland have detained 76 people and checked nearly 50,000 schools nationwide as part of efforts to prevent further violence following two school attacks earlier in the week. ↧ Police detain dozens and check 50,000 schools after 2 attacks shake... A third attack at a Polish school has taken place in less than a week