cops opened fire on two men who started a gunfight with each other at a crowded festival in San Antonio.

The footage shows people enjoying the final day of the Fiesta San Antonio at Market Square when shouts and gunfire can be heard.

Two men were killed in the shootout, and four civilians were wounded, according to police.

The crowds could be heard screaming in horror and running away as gunshots rang out before coming to a halt seconds later after one gunman downed the other before police apparently shot the remaining armed assailant.

“Oh my god!” one woman is heard screaming in the aftermath.

San Antonio police said the shooting occurred near the stage on Conch Alley, where an 18-year-old and a 20-year-old fired at each other, the San Antonio Express-News reports.

Police were chasing the teenager when one of his shots hit the 20-year-old, downing the man and triggering police to open fire at him.