Police are investigating a possible sexual assault in Flushing Meadows Park that left a 28-year-old woman unable to remember what happened to her.

A passer-by found the unconscious victim, her skirt disheveled and her face bruised and cut, at about 11:30 p.m. Friday near the New York Hall of Science, law-enforcement sources said. When she awoke in a hospital, she said she had no memory of being attacked or of how she got there.