"This child should have been at home playing with his mother and father, waiting for Christmas," cries a man attending a vigil held outside a school in Croatia's capital Zagreb where a seven-year-old pupil was killed in a knife attack. The 19-year-old attacker injured three other students and a teacher, all of whom were hospitalized. The attacker, a former student of the school, tried to commit suicide with the knife immediately after the attack before being arrested by police. IMAGES AND SOUNDBITES