YUCAPIA (CBSLA) — Authorities say a 28-year-old man has been arrested in connection with the death of his 6-month-old daughter.

Alfonso Ornelas of Yucaipa was arrested on charges of murder and assault on a child causing great bodily injury / death.

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Deputies responded to a medical aid call Saturday regarding a child not breathing.

When they arrived, they began life-saving measures. The baby was rushed to the hospital, where she was pronounced dead around 6:41 p.m.

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Following her death, authorities launched an investigation which resulted in the arrest of Ornelas.

It remained unclear at the time of publication whether charges had been filed against Ornelas.

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No further details have been released.