FONTANA (CBSLA) — Fontana police discovered an underground shooting range Thursday night.

Members of the SMASH (Gang) Unit found the shooting range after obtaining a search warrant to search the home of a known gang member.

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A manhole was discovered that led to the underground shooting range.

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Weapons and ammunition were found in the residence including a 100 round drum for an AR-15 rifle.

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Fontana PD announced that suspects were taken into custody.

The manhole leading to the underground shooting range. (Photo courtesy of Fontana PD)