The plane, carrying 118 passengers and five crew members, had already pulled away from the gate at Mitchell International Airport on Sunday evening. It returned to the gate, the passengers got off, security authorities were notified, all luggage was checked and the aircraft was inspected. Nothing was found.

The passengers were put up in nearby hotels and booked on a Monday morning flight.

The writing was in Farsi, the language used in Iran, said airline spokeswoman Carol Skornycka. She said she didn’t know exactly what the writing said but was similar to a prayer, “something of a contemplative nature.”