A customer who was open-carrying a firearm helped stop a robbery in progress at the Circle K, 1918 E. Fifth St., Dayton.
The robbery attempt happened around 8:30 p.m. Saturday, according to the Dayton police report.
The robber, described as 5-feet-11 inches and 200 pounds, immediately ran out of the store, according to the report.
Police said a masked man walked into the store and pointed a crhome handgun at the clerk, demanding money.
One of the store's six customers saw what was happening and drew a .45-caliber handgun from his side. He pointed it at the robber and told him to leave, according to the report.
Witnesses told police the robber fired a single round in the alley by the store as he ran away.
A few hours later, a masked man used a chrome handgun to rob the All In One store on James H. McGee Boulevard.
It's unclear if the two incidents are linked, but the All in One robber was described as smaller than the one described at the Circle K