Police are investigating what appears to be a fetus was found in Brooklyn.

The city medical examiner's office says it won't know what exactly was found in Bushwick's Maria Hernandez Park until early next week but witnesses said it looked like a human fetus.

It was found on the ground near the entrance to a playground this afternoon.

A passerby covered it with a box before investigators took it away.

"When I was walking up the park, I saw a baby's body on the floor and I took a picture of it, and there were no eyes, nothing," said an eyewitness. "You could see the shape of the body, the shape of the head, but after the mouth you can't see anything, the cops were telling me."

Police say the medical examiner's decision will come by Monday.