Dozens of people mass outside the school, many apparently parents frantically searching for their children.

A 47-year-old jobless man with knives killed at least 4 children and injured more than 20 at a kindergarten in eastern China's Jiangsu Province Thursday.

Dozens of people mass outside the school, many apparently parents frantically searching for their children.

The attack is the latest in a wave of senseless violence that happened in schools or kindergartens.

The first attack happened on March 23, when a former community doctor hacked eight students to death and seriously injured another five in Nanping, Fujian Province. Four weeks later, a teacher stabbed 15 students and one teacher in Leizhou city of Guangdong Province.