Authorities think Sullivan was abducted and is in extreme danger, the station reported.
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According to The Atlanta Journal-Constitution, the boy was last seen with his mother, Aimee Lowery, whom authorities described as homeless and known to use drugs. Police said Lowery, who does not have custody of the child, is believed to be driving a white 2002 Lexus RX300 with the Georgia license plate WF9F09.
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If you see the pair, call 911 or the Savannah Police Department right away.
According to WSB-TV, an Amber Alert was issued Monday evening.
– The Atlanta Journal-Constitution contributed to this report.