Three bandits then fled, but police took the trio into custody a few blocks away from the location, Romero said.
Originally, the three other suspects were believed to have been wounded by the gunfire inside the store, but they were not hit, he said. They were also detained by police, Romero said.
Romero said it was unclear whether the suspects returned fire, but no officers, employees or customers were hurt.
During the attempted holdup, the robbers held the store's employees in a back room, Romero said.
The names of those in custody were not immediately released.
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