I was driving around town running errands. I parked and went into a store. Came out thirty minutes later and it started fine, got about a mile down the road and the car had shut off.
I am able to start it but as soon as I let off of the key and it settles into the run position the car shuts off. I can start it over and over again and it sounds good starting up but as soon as I remove my hand from the key it shuts off again. I was only about two miles from home so I just drove home with my hand holding the key in the start position. It worked but I do not know what would cause this.

Does anyone have any suggestions as to what is wrong?

Thanks