TOKYO — Japanese leaders reacted angrily Friday after the police on Okinawa said a US Air Force serviceman was suspected of breaking into an apartment while drunk and punching a schoolboy, just weeks after two US sailors were accused of raping a woman on the same island.

The trespassing and assault took place early Friday morning, police said. The airman was apparently in violation of a curfew imposed by the US military on its roughly 50,000 military personnel in Japan following the rape accusation. The police did not release the name of the 24-year-old airman, who was hospitalized after falling to the ground from a third-story window.