The perpetrator, Rickard Andersson, traveled to Campus Risbergska and arrived by bus at 07:45
CET, five hours before perpetrating the attack.
Aftonbladet reported that the weapons were transported into the school inside a guitar case and in two bags. After arriving at the school, Andersson walked to a restroom and started preparing for the shooting. He would stay in the restroom for more than an hour, during which he changed into "military-style garb" consisting of a dark green T-shirt, black pants, boots, a
knife sheath, and several pouches containing ammunition. He also removed items from his bags and guitar case, prepared his weapons (a
Browning BAR rifle, a
Mossberg 590A1 shotgun, and a
Ruger 10/22 rifle), and took a mixture of
amphetamine and
caffeine. At 12:31, Andersson exited the restroom with his three guns, carrying the
.30-06 Springfield Browning BAR in his hands. Upon exiting the restroom, Andersson came across a student and shot them at close range. He then went to an adjacent classroom and fired at the occupants inside as they tried running out the opposite door, fatally shooting six people and wounding a seventh. After firing into the classroom, Andersson turned towards a corridor and fired at one of the exits. Around the same time, a person outside the school began filming him through the glass doors. Andersson then turned around and went to the school's main corridor, fatally shooting one person in a doorway leading to the corridor and wounding another in the corridor itself. Andersson moved north towards a classroom and fatally shot another person near an exit. He then set off two
smoke grenades, which triggered the school's
fire alarm, before proceeding to another corridor where he injured two people. Andersson then killed two more people near another exit — one in a classroom and one in the corridor — and set off a third smoke grenade before walking through the school building on an unknown path. Two teachers at the school told
Dagens Nyheter that they heard gunshots coming from a corridor, followed by silence for a half-hour, and then more shooting. Maria Pegado, a teacher at the school, recalled escaping with her 15 students after hearing gunfire. Ingela Bäck Gustafsson, the school's principal, was eating when students ran in and told everyone to evacuate; she and others took shelter in the staff room of Myrorna, a nearby
second-hand store. Lena Warenmark, another teacher at the school, said that fewer than usual students were in the building at the time of the shooting since many had gone home following a national exam. The shooting was still ongoing during this time, and continued as police officers were searching the school building. At approximately 12:43, a squad of police officers were shot at by Andersson, who fired multiple rounds down the main corridor. None of the officers fired back at the gunman,, before finally shooting himself in the head with his Browning BAR. His body was found by officers at 13:30, nearly an hour after the shooting started. Andersson was determined to have fired 73 shots in total, including his suicide shot. All but one of the shots were fired from his Browning BAR, with the only other shot coming from his Mossberg shotgun. Andersson's third gun, the Ruger 10/22, was never used during the attack. All of his firearms were found near his body, along with ten empty
magazines, 100 cartridges, and a large amount of unused ammunition.
Immediate response Around 120 police officers were dispatched to the school following the shooting and soon cordoned off the area. Police in Värmland and
Dalarna also provided reinforcements. The
Swedish Police Authority stated that the perpetrator had acted alone and confirmed that he had died in the attack.
Sveriges Radio, citing initial police investigations, stated that an
automatic firearm had been used in the shooting. ==Casualties==