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.

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.

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.

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