A 52-year-old man killed his wife and children with a weapon and hanged himself at a day care center on Jeju Island, officials said Monday.
  

The man, identified only by his surname Koh, was found dead on the second floor of the center, where he lives together with his family, by a teacher, the Jeju Fire Safety Headquarters said. Also found dead were his 40-year-old wife Yang, who is the head of the day care, and two children, aged 14 and 11.
  

The teacher first reported at 7:58 a.m. that she had discovered Koh's body, and police found the three others while searching the scene.
  

The wife remarried Koh four years ago. The son and the daughter are from Yang and her ex-husband, police said.
  

There have been statements from their acquaintances that they had recent family troubles.
  

Koh did not mention his family in his suicide note, police added.
  

Police are investigating the case based on the teacher's statement that she smelled smoke when she first discovered Koh. So far, there have been no signs that a fire was made at the center, according to the police.
  

"While the deaths seem likely to be Koh's conduct, we need to first find out the motive," police said. (Yonhap)