A 4-year-old Vancouver boy died Friday after complications from a dental procedure.

Mykel Wayne Peterson went to a routine dental visit at Must Love Kids Pediatric Dentistry, 601 S.E. 117th Ave., and his dentist suggested a repair to previous treatment. But there were complications with the procedure, according to an online donation page set up for Mykel’s family.

The boy was put to sleep by an anesthesiologist and later brought out to the waiting room, Mykel’s mother told KATU News, a news partner of The Columbian.

Mykel was breathing at the time, but his mother was worried that he’d been unconscious for too long. When she asked the doctors if anything had gone wrong, the anesthesiologist admitted to giving Mykel “a bit” more anesthetic, the news station reported.

Mykel stopped breathing and was rushed to a hospital, KATU reported. Mykel’s mom said the boy was developmentally delayed but had no health problems to speak of prior to his death, according to KATU.