In the low-level buildings of Campus Risbergska in Orebro, a 35-year-old man stalked the corridors looking for his targets.

OREBRO, Sweden (AP) — Swedish police said the gunman in the country's worst mass shooting was connected to the adult education center where he opened fire Tuesday, killing 10 other people. Police later found him dead. Authorities on Thursday said the gunman may have attended school there.

Students prayed under their desks and trapped teachers sent desperate texts to loved ones when a gunman opened fire at an adult education centre in Sweden, leaving 11 people dead. Armed police exchanged shots with the suspect at the Risbergska School, an adult campus in the city of Orebro, some 125 miles west of Stockholm.