A Texas mother died Sunday night after the car she was driving in was struck by a large rock thrown from an overpass in Temple.

Keila Ruby Flores, 33, was the front seat passenger in a vehicle traveling northbound on I-35 between exits 303 and 305 when a rock broke through the windshield, killing her. Her boyfriend and their three children were also in the car but were unharmed, according to KWTX.

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“An explosion just comes right through the window. I didn’t know what it was,” the boyfriend recalled. “I look over and I see Keila and she is laying there unresponsive. I’m just shaking her, trying to wake her up, (but) she was unresponsive.”

A suspect hasn’t been identified and authorities have ordered an autopsy to confirm a cause and manner of death.

This is an ongoing investigation. Anyone with information about Sunday’s incident should call the Temple Police Department at 254-298-5500.

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[Featured image: Keila Flores/Facebook]