Most of those wounded were between 12 and 14 years old."I heard multiple gunshots and felt like we weren't going to survive," 14-year-old Khim, who asked to be only identified by her nickname, told Reuters on Saturday, describing how her classmates moved desks to block a door, turned off the lights and huddled together near the classroom windows.Her mother messaged her to warn about the shooter as she was trapped inside her classroom.Over the shooting's approximately 40 minutes, photographs of the alleged shooter stalking around the school circulated through student chat groups."Then, I heard a bang that was extremely loud I didn't know if he wanted to shoot the whole school."Khim's class received instructions to evacuate as police secured parts of the school — but the shooter had moved on to the next building, where Khim's older sister was still hiding."Count the shots to see if he's out," Khim's mother Kwan — who also asked to be identified by a nickname — told her elder daughter over the phone.She had guessed the shooter was using a handgun, which would not hold more than 20 rounds.Police said the alleged shooter had used at least 26 bullets