7 injured in knife attack at school in Poland

A knife attack at a school in the central Polish city of Ostroleka injured at least seven people on Wednesday, two of them seriously, reported Xinhua, quoting Polish radio station RMF.

The attacker, a 19-year-old student at the school, fled after the attack but was later arrested by police, RMF said.

Most of those injured were students, while one was a teacher, according to the report.