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.”

Police believe 10 people have been killed, including the perpetrator, 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 at a school on Tuesday, in what has been described as the worst mass shooting in Sweden’s history. The suspected perpetrator is among the dead.