Mark Sanchez's stabbing incident early Saturday morning drew a large police response ... and, we've obtained the 911 dispatch audio from the incident.
In the clip, first responders are asking if there are any surveillance cameras nearby they can tap into ... while they hustle to the location from where they got a 911 call.
One man on the call tells the group they need to lock down the bar where the incident occurred ... with orders to treat it like a crime scene -- no one in or out.