An argument involving more than 20 people began inside Albertaco's Mexican Food in Vista about 1:20 a.m., U-T San Diego reported.
The melee spilled outside and different kinds of weapons, including broken bottles, a billy club and pieces of wooden fencing, were used, Sgt. Nick Maryn said.
Most of those involved ran off when deputies arrived at the scene, U-T San Diego said.
Maryn said one victim who suffered a minor stab wound was taken to the hospital, and another with similar wounds also went to the hospital later in the morning. Another person had a broken nose.
Witnesses were unable to identify those who participated in the fight, so no one had yet been arrested. The investigation was ongoing, Maryn said.