Less than 24 hours after President Donald Trump signed an executive order barring immigration and refugee admission from seven Muslim-majority countries, border officials in Chicago turned away a Syrian woman whod flown to the U.S to visit her sick mother, the womans sister told The Huffington Post Saturday.

Sahar Algonaimi, a 60-year-old Syrian national who lives in Saudi Arabia, was detained for nearly five hours at Chicago OHare International Airport Saturday morning. She was ultimately forced to board a flight back to the United Arab Emirates, from where shell go on to Saudi Arabia.

Her sister, 40-year-old Nour Ulayyet, who lives in Indiana and is an American citizen, provided HuffPost with photos of Algonaimis plane ticket; her visa to enter the U.S., issued by the U.S. government; and a signed letter from a surgeon to immigration officials saying Algonaimi was needed to assist in the care of her sick 76-year-old mother, who is recovering from a surgery for breast cancer.