A 12-year-old boy was stabbed during a robbery on a Bronx sidewalk Thursday afternoon, police said.

The teen, who was left in critical but stable condition, was attacked by a trio of robbers who demanded his property, cops said.

The victim was stabbed once in the back and showed up via private means to Jacobi Hospital at about 4 p.,m., police said.

Police did not immediately provide the exact location of the crime.

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