A fight between two coworkers at a Lenny’s in Midtown turned bloody last night when one took a knife and stabbed the other in the neck, cops said.

The violence, which happened four hours after the deli had closed, occurred after 11 p.m. inside the eatery on Second Avenue. The unidentified victim was rushed to NYU Hospital in stable condition.

No arrests were made and it wasn’t immediately clear what sparked the bloodshed.