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.

Around 10 people were killed in a school shooting in Örebro. The damage at the crime scene was so extensive that investigators were unable to be more definitive, said Roberto Eid Forest, head of the local police.

Swedish police are investigating for a motive after a school shooting in the city of Örebro that has killed at least 10 people. NBC News’ Matt Bradley reports on what is known about the shooting.