Published: Jan 02, 2013 4:14 PM EST

HOUSTON- An American Airlines passenger was dead upon arrival at George Bush Intercontinental Airport in Houston today.

Police say the 25-year-old Brazilian woman died during a flight from Sao Paulo, Brazil and her death is now under investigation. The airline says the flight to Dallas was diverted to Houston because of a sick passenger.

An autopsy is now will determine the cause of death.