MOSCOW (AP) — A 10th-grade student with two rifles burst into his Moscow school on Monday, killing his geography teacher and a policeman in front of about 20 students, investigators said. His father played a key role in freeing those students before police stormed the classroom and took his son into custody, the city police chief said.

The student gunman also seriously wounded a second police officer who had responded to an alarm from the school, investigators said.