A 63-year-old Philadelphia woman was among four passengers killed in a bus crash early Tuesday in Virginia, authorities said.

Sie Giok Giang was riding on the Sky Express Bus headed to Chinatown in New York when it overturned on Interstate 95 between Richmond and Fredericksburg at 4:55 a.m., said the Virginia State Police. The bus had departed from Greensboro, N.C. at 10:30 p.m. Monday.

Twenty passengers remained hospitalized on Wednesday. All of the 53 surviving passengers were injured. The driver, Kin Yiu Cheung, 37, of Flushing, N.Y., was charged with reckless driving. Federal regulators on Tuesday halted Sky Express Bus from operating based on multiple violations. The cause of the crash is under investigation.

   -Robert Moran