The U.S. Marines in Okinawa said Wednesday that a piece of rubber protective tape attached to a wing blade of a U.S. military helicopter fell onto the grounds of a junior high school in Okinawa the previous day.

It was the latest incident involving a part falling from a military aircraft in the southern island prefecture, which hosts the bulk of U.S. forces in Japan. No one was injured in the latest occurrence.

The tape, which landed on a tennis court at Uranishi Junior High School Tuesday afternoon, was initially described by school officials as a black rubber sheet around 12 centimeters long, about 18 cm wide and weighing 20 grams.