An Amber Alert issued Tuesday in Manhattan was canceled after police located the abducted 7-month-old child unharmed and arrested his mother Wednesday afternoon.

The NYPD said details surrounding the arrest of Marina Lopez, 25, and the safe return of her son, Mario Danner, were still emerging -- and that charges against the woman would be announced later in the day.

Mario was taken to an area hospital "for precautionary reasons," NYPD said in a news release.

It was not immediately clear where the mother and child had been located.

The search was highlighted on electronic signboards along major roadways -- the Long Island Expressway, the Northern State and Southern State parkways -- which posted the Amber Alert to enlist the assistance of drivers making their commutes Wednesday.

That alert was launched Tuesday afternoon after the abduction of Mario by his mother from Seventh Avenue in Manhattan, officials said. The abduction occurred during a supervised visit, officials said.

The search alerted drivers to be on the lookout for a tan 1995 four-door Lexus ES300 sedan with New York gold license plates bearing GEX 1377.

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The NYPD said Lopez, who is about 5-foot-6 and 130 pounds, had last been seen wearing a pink T-shirt and floral shorts heading on foot for Shorefront Parkway in the Rockaways. Police said Lopez is a noncustodial mother and said the baby boy had been taken from her because she is bipolar and has had "recent outbreaks of violence."

The NYPD said Lopez took the child during a supervised visit with ACS just after 3 p.m. on Tuesday.