Story highlights His hoodie caught on a dressing room coat hook

He hung there while his grandmother looked for him

(CNN) It's an unspeakable tragedy that happened in the most mundane of places -- a thrift store dressing room.

Over the weekend 4-year-old Ryu Pena was at Again Thrift and More in Mankato, Minnesota, when he accidentally hanged himself in the store's dressing room.

Police say Ryu slipped away from his grandmother, who was shopping at the store, and went into an empty changing room. He apparently closed the door, climbed on a bench and got the hoodie he was wearing caught on a coat hook.

"We believe that he got himself caught up on a coat hook within that dressing room area and couldn't free himself from it," Commander Jeremy Clifton with Mankato Public Safety told CNN affiliate WCCO

Ryu's little feet couldn't reach the floor, so he hung there and suffocated, all while his grandmother and others frantically looked for him. By the time he was found, it was too late.

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