Police say a 4-month-old baby was stabbed in the head this evening after an argument between two women. Investigators say the incident happened at the corner of Union Avenue and East 165th Street. They say the baby was with her mother when the two were approached by another woman. The baby was injured during the exchange, but is expected to recover. She was taken to Lincoln Hospital and is expected to recover. The suspect fled the scene. Anyone with information is urged to call Crime Stoppers at 1-800-577-TIPS.