I don't know any more than you do, Joe.
3 seconds sound clip from the The War of the Worlds (1953) movie soundboard.
You can hear this line at 00:19:15 in the DVD version of the movie.
Quote context
[...]
- Do you have a pocket compass?
- Yeah.
- Hey, that needle isn't pointing north.
- It's pointing to the gully where that meteor came down.
- All right, folks, let me through. Let me through.
- I don't know any more than you do, Joe.
- The power lines are down. That explains why the lights went out.
- What...? Hey, look at the car.
- Where are the three men you left out here?
[...]