The robber went inside  Ranchito Taqueria in Houston demanding customers and the restaurant workers to hand over their money.

As the robber was about to leave he pointed what appears to be a gun toward one patron who would later shoot and kill the robber.

The New York Post had these details to add:

An armed robber at a Houston restaurant was fatally shot by a customer when he demanded the other patrons hand over their money, authorities said.

The shooting unfolded inside of Ranchito Taqueria around 11:30 p.m. Thursday when a masked suspect walked in the front door, pointed a gun at customers and demanded their money and wallets, Houston Police Department said.

Disturbing footage of the incident shows terrified customers hiding under tables as the robber, dressed in all black, marched around and grabbed their belongings, which some had flung on the floor.