Dozens wounded in knifing attack on kindergarten in S. China

A school security guard in South China is under arrest after injuring some 40 people in a knifing attack on a kindergarten. The head of the school and another security guard were injured along with 37 children, some seriously. The motive behind the attack is unknown. It appears to be a revival of a series of school attacks that hit China in 2010 in which 20 children were killed and which led to gates and security guards being posted at schools.