(MCT) — A baby gorilla born at Lincoln Park Zoo last fall is recovering from a serious facial injury she suffered last week that may have been inflicted by another gorilla.

Zoo staff discovered on Wednesday that Nayembi, born Nov. 16 to mother Rollie, had been injured, according to a zoo spokeswoman. Animal care staff immediately separated the infant and Rollie from the rest of the gorilla group, which includes her father, Kwan, also the father of baby gorilla Patty, born at the zoo in October, according to a blog post by Lincoln Park Zoo President Kevin Bell.