Fourteen pupils and a teacher are injured in a fight at a Russian school.

Initial reports said that two masked men attacked the school in the city of Perm,
But the regional Investigative Committee branch later said that it was a fight between two students with knives and that teachers and other students tried to break it up.
A 16-year-old teenager was arrested.

According to the Russian media, the suspect had previously been on a register of people diagnosed as having mental-health problems.