A woman was slashed in the face Sunday by another woman on a subway in midtown, police said.
The victim had a 3-year-old child with her when she was attacked, the NYPD said. The child wasn't hurt.
A woman got on the northbound 5 train and started arguing with the 31-year-old victim while the train was moving, police said. The woman then slashed the victim, police said.
The attacker got off at Grand Central and ran off, police said.
She is now in custody, police said. She has not been identified, but she was living in a homeless shelter and has been arrested before, police said.
The victim was taken to Bellevue Hospital, police said. She was expected to survive her injuries.