BOSTON (CBS) – Thirteen students were hospitalized after becoming ill on a flight from Miami to Boston on Sunday.

American Airlines Flight 1201 made its scheduled arrival at Logan Airport before 10 a.m.

The students, who were part of a group of about 40 people, were on a connecting flight when they became ill.

Victims were complaining of stomach virus symptoms. No other passengers or crew reported symptoms.

The ill students were taken to Massachusetts General Hospital. By 3 p.m., five patients were released and were in good condition, according to the hospital.

Emergency personnel have since cleared the airplane.