SPARKS, Nev. (AP) - Sparks police seized dozens of firearms from a house in a suburban neighborhood a half-block away from an elementary school Thursday after responding to a report about mental health concerns.

An evidence team took inventory Thursday of at least three dozen weapons stacked in a driveway outside the home on Del Rosa Way across the street from Diedrichsen Elementary School in east Sparks.

The cache of guns included black assault-style weapons, rifles, shotguns and handguns.

No arrests have been made but an investigation is continuing.

Sparks police Sgt. Ben Russell said in an email to The Associated Press the active investigation "is in regard to a mental health issue." He says no further details will be released at this time.

The school is on summer break.

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