The youths, aged 16, 21 and 25 years, were injured early on Saturday morning during a fight between two groups in avenida Isaac Peral, Málaga city.
The fight occurred at 04:40 and the three injured youths were treated at the Hospital Clínico in Málaga, although their wounds were minor.
One of the gangs fled the scene when the police arrived, leaving a number of weapons behind.