The NYPD is investigating an attack on a woman dinning at a Manhattan restaurant as a bias case.

Police say the woman was having dinner with her mother at an outdoor cafe Saturday in the Barkogi restaurant in midtown when two women and a man sitting behind them started yelling obscenities and gay slurs.

The suspects then allegedly threw the woman to the ground and dragged her by the legs before fleeing.

The victim had cuts and bruises to her knees and was treated at a hospital.

Police say neither woman knew the attackers.

The NYPD's hate crime task force is investigating.

Anyone with information about the attackers is asked to call Crime Stoppers at 1-800-577-TIPS.