Salinas police are investigating a knife assault. Shortly before 1 a.m., Saturday, patrol units arrived on the 400 block of Main Street to reports of medical assistance needed for a stabbing victim. At the scene police located a 30 year old man with a non life threatening wound to the back. The victim reported being attacked and stabbed by a group of 4 men wearing red and black clothing. Anyone with any information is encouraged to contact Salinas police.