All were the victims of a gang battle which transpired when one invading mob was trapped in the restaurant by another faction.
8 seconds sound clip from the The Roaring Twenties (1939) movie soundboard.
You can hear this line at 01:20:54 in the DVD version of the movie.
Quote context
[...]
- We want to get out of here. We want to get out of here!
- We have a special news bulletin.
- That's right, George, you didn't get me.
- Take your hand off that heater, Lefty.
- The only thing saving your neck is I can't prove you dealt me a second.
[...]