Ye Olde Chosun is reporting that an 81-year-old man by the name of Kim has been arrested on charges with setting the fire at the convalescent hospital in Jangseong, Jeollanam-do that killed 21 and injured eight.

The man had previously been treated at the hospital for dementia.

The hospital’s CCTV apparently got Kim entering and leaving the room where the fire originated one minute prior to the start of the blaze.

I’m sure we’ll be learning more soon.

UPDATE: Kim was apparently still a patient. And police think he started the fire by setting bedding alight with a lighter, although why he did so, they do not know. For what it’s worth, the guy—who is apparently with it enough to undergo questioning—is denying the charges.