Police have said 11 people have been killed after a gunman opened fire at an adult education centre in Örebro, Sweden.Armed police were scrambled to Risbergska School at lunchtime on Tuesday as terrified students hid under their desks and barricaded themselves in classrooms.

Police said “around 10 people” were killed in a shooting at a school in central Sweden on Tuesday, with the suspected perpetrator believed to be among those dead.

About 10 people including the gunman have been killed at an adult education center in what Sweden’s prime minister called the country’s “worst mass shooting.”