Three 5-year-old children were attacked with a weapon by an assailant outside a daycare center in Zurich, Switzerland, leaving one seriously injured.

According to reports from AP, AFP, and Reuters on the 1st (local time), Zurich police said in a statement that day, “A daycare teacher was heading to a daycare center with several children when a man suddenly attacked the children with a weapon.”

The police said the daycare teacher quickly subdued the assailant with the help of another man, and explained the assailant’s identity as a 23-year-old Chinese man. The motive for the crime was not revealed.

All three 5-year-old boys who were stabbed were transported to the hospital and are being treated. One of them was seriously injured. A police psychologist and a treatment team have now been deployed to care for the affected children, AFP reported.

Reporter Jo Si-hyung jsh1990@wowtv.co.kr