In an yet another shooting spree, a teenager has opened fire in a school killing 10 people. The culprit was also identified as high school student. He has used a shotgun and a revolver that were owned by his father. However the reason for his desperate action is unknown. Nine students and one teacher were dead in the incident and ten other students were injured. Unfortunately, this is the third school shooting in the past week, and the 22nd since the beginning of the year in US.