By CBSNewYork Team

NORTH BERGEN, N.J. (CBSNewYork) — A grandmother and her young grandson are in critical condition after a hit-and-run in New Jersey.

Prosecutors say the 56-year-old woman and her 3-year-old grandson, who are both from Queens, were crossing Tonnelle Avenue and 46th Street in North Bergen when a car hit them and took off.

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It happened shortly after midnight Saturday.

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Police say the victims are now fighting for their lives at Jersey City Medical Center.

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Investigators are looking for the driver, who was believed to have been in a mid-size sedan.

CBSNewYork Team