HAMILTON, N.J. (CBSNewYork) — An AMBER Alert has been cancelled for a toddler in Hamilton, New Jersey who was thought to have been abducted by his non-custodial mother.

New Jersey State Police said that 2-year-old Mason Ross may have been taken by Cassidy Michaela Purdy, who was last seen wearing a gray and white-zippered sweater, tank top and black Converse sneakers.

Earlier, police said they might have been possibly en-route to Atlantic City on foot or bus. The child was wearing a black shirt, blue jeans and white tennis shoes.

The circumstances surrounding the boy’s disappearance are not yet clear.