DALLAS (AP) — Police in Dallas, Texas, say five Oregon children were waiting with their mother to board a bus at a Greyhound bus station when the woman suffered a medical emergency and later died.

Police spokeswoman Ashaki Hardeman says the 29-year-old woman was taken Thursday to Baylor University Medical Center, where she died.

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The Dallas County Medical Examiner’s office tells The Dallas Morning News that 29-year-old Felicia Hayles of Roseburg, Ore., died from blood clots due to obesity.

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Hardeman says Greyhound officials waited with the five children until police officers arrived to take them to Child Protective Services, which has contacted their father.

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Greyhound spokeswoman Jen Biddinger says the bus line has agreed to provide the children with free bus tickets to Oregon.