An Elizabeth 15-year-old who hasn't been seen since Saturday is the subject of a missing-child alert issued by New Jersey State Police.

Sebastian Cardona (NJ State Police)

Sebastian Cardona is described as Hispanic, five feet in height, weighing 100 pounds, with blond hair and green eyes.

Sebastian vanished after spending part of September 17 at a soccer game in Elizabeth with friends. Police did not disclose the venue at which the soccer game took place.

He wore a blue tee-shirt, khaki shorts, black-framed eyeglasses and Nike sneakers, and last seen with a black-and-red bicycle..

Anyone with information that can help lead to Sebastian's location should call the NJSPD Missing Persons Unit, 609-882-2000, ext. 2554, or Elizabeth police, 908-558-2000.

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