Eleven people were killed in a shooting at the Risbergska School in Örebro, some 125 miles west of Stockholm, on Tuesday.Police said the gunman was believed to be among those killed and a search for other possible victims was continuing at the school.

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.

School attacks are relatively rare in Sweden, but the country has suffered shootings and bombings linked to gang violence that kill dozens of people each year.