That man was disarmed by others inside the hall and fled before police arrived.
Police now suspect the two incidents are related.
The surveillance photos were taken at the dance hall incident.
Police investigate a man slumped over the wheel of a van allegely connected to Saturdays mass shooting in Monterey ParkAllen J. Schaben / Getty Images
Luna said in a tweet that authorities had identified him as a homicide suspect.
The persons condition has not been confirmed.
Said Luna earlier, Could it be our suspect?
Luna said authorities are withholding the suspects name at this point.
He is thought to have been wearing a black leather jacked, a beanie and glasses.
The City of Monterey Park canceled the second day of its Lunar New Year festival.
