A Texas mother who had been missing since Monday was found dead by police in her SUV Thursday evening with her three young children alive beside her, PEOPLE confirms.



Before she was found dead in the parking lot of a Target store in McKinney, Christine Thi Woo, 39, had last been seen at her residence on Monday morning, a statement on the Frisco Police Department's Facebook page says.



Her three children – a 1-year old girl, 3-year-old boy and 5-year-old girl – were transported to a local hospital, according to another statement on the page.



Woo's cause of death is currently unknown and will be determined by a Colin County Medical Examiner, the statement says. Police have not said if there were signs of physical trauma or foul play.



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Sgt. Jeff Inmon with the Frisco Police Department said on Thursday it was unknown how long the SUV had been in the parking lot.



Fox 4 reports that the children were severely dehydrated when they were found.



Before they were found, the Frisco Police Department released surveillance video of Woo and the children entering a local store.



In an interview with CBS News, Woo's husband, Brandon Woo, described Christine as "a loving mother, a great wife. She's the most stable person you could ever meet."

Missing Texas Mother Found Dead in SUV in Parking Lot with Three Children Alive Beside Her| Crime & Courts, Death, True Crime