EL PASO, Texas (CBSDFW.COM/AP) — Police in El Paso are trying to identify a man who they say saved several lives during the deadly mass shooting at a Walmart on Saturday, August 3.

El Paso Police on Thursday shared a surveillance camera photo of the man, saying that he’s considered a “hero” and that authorities need to interview him.

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Police said on Twitter that the man’s actions were “critical and lifesaving” and that he’s believed to have saved many lives during the shooting, including an infant’s.

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El Paso Police Sgt. Enrique Carrillo says police are not releasing details of what the man did because that information is needed to verify his identity.

A gunman has confessed to targeting Mexicans in the attack in which 22 people were killed.

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