One person was stabbed in fight involving about 20 people Saturday afternoon on the beach in Santa Monica. 

The fight broke out at about 3 p.m. on the beach near the Santa Monica Pier, police said.

Details about possible injuries were not immediately available, but none are considered life-threatening. Police said some people were treated for injuries at the scene.

Five people were taken into custody.

It was not immediately clear what led up to the fight.