Another crazy guy with a mental illness has launched a stabbing attack in South Korea:

A local court issued a warrant Saturday to arrest a man suspected of stabbing a teacher at a high school multiple times.
The Daejeon District Court granted a warrant to formally arrest the suspect in his late 20s on charges of attempted murder, citing the risk of flight.
The man stabbed the teacher, including in the face and chest, at a high school in Daejeon, 139 kilometers south of Seoul on Friday. He was quoted as telling police that he was a student of the teacher in the past, but his claim has yet be verified.
The teacher, 49, underwent urgent surgery after the stabbing, but remains in critical condition.
Police said the suspect was diagnosed with schizophrenia and depression in recent years, but did not receive any treatment.
Yonhap
You can read more at the link, but with all the media attention these attacks are getting, authorities are worried about copycat attacks now by other mentally ill people.