The Japanese government condemned on Friday an incident in which a U.S. serviceman allegedly entered a residence in Okinawa and struck a boy of 13.

The 24-year-old serviceman stationed at the Kadena base on the southern Japanese island had been drinking at a bar Thursday night before he wandered upstairs to an apartment in the same building, police said.

After allegedly hitting the teenager, the intruder fell out a third-floor window and was hospitalized.

All U.S. military personnel in Japan have been under a night-time curfew since two American sailors were arrested in Okinawa last month on charges they raped a Japanese woman.

Japan's foreign minister, Koichiro Gemba, described the latest incident as "inexcusable" and said Tokyo will request a high-level meeting with U.S. officials to discuss the case.

Around 26,000 U.S. service members are stationed on the island of Okinawa, where resentment over the foreign military presence has been strong for years.

Residents complain about the dangers posed by the proximity of bases to heavily populated areas and about crimes committed by service members.

The most serious episode was in 1995, when three U.S. servicemen abducted and raped a 12-year-old girl. EFE