As police arrest a teenage student suspected of carrying out a school shooting in the Serbian capital Belgrade which left at least eight students and a security guard dead, Astrid Merlini, mother to one of the attack's survivors, said her daughter, who was in the same class as the suspect, "told me that he was a good and quiet boy." "She saw the security guard collapse, right in front of her... she immediately rushed back to class, she was scared. She told her teacher – there is a shooting upstairs," Merlini adds. The incident has rocked the Balkan nation, where school shootings are extremely rare and gun violence is uncommon. SOUNDBITES