Compounding the American military 's difficulties on the Japanese island of Okinawa , a U.S. airman is under investigation over allegations he broke into a local family 's home early Friday and assaulted a teenage boy before jumping off a third-floor balcony . The incident is likely to further deepen resentment among Okinawan residents about the significant U.S. military presence on the island . The situation was already extremely delicate following the arrest last month of two U.S. sailors accused of raping a local woman . That case prompted angry protests from Japanese officials and local residents . The U.S. military responded by imposing a nighttime curfew on its thousands of troops in the country -- a restriction the airman appears to have disobeyed Friday . According to Okinawa police , the suspect is alleged to have broken into the family 's apartment in the village of Yomitan around 1 a.m. Friday , hit a 13-year-old boy who was in bed and damaged a television set . The boy was left with an injury to his cheek . The airman suffered `` possible broken bones and internal injuries '' after jumping from the apartment 's balcony and has been admitted to a military hospital on the nearby U.S. Air Force base of Kadena , U.S. military officials said . Japanese Foreign Minister Koichiro Gemba called the incident `` outrageous , '' noting that it took place despite the U.S. military curfew . He said the Japanese authorities would lodge a complaint with the United States . The U.S. ambassador to Japan , John Roos , said he was also appalled by reports of the incident . `` Let me be absolutely clear : I am very upset -- it 's an understatement to say I 'm very upset , '' he told reporters in Tokyo on Friday , expressing concern about the well-being of the Japanese boy who was allegedly attacked . He stressed that the U.S. military forces in Japan are `` undergoing a complete review of the liberty policies and other policies that will minimize , if not eliminate , any such incident in the future . '' `` It is incredibly unfortunate that the purported actions of a few reflect badly on thousands of young men and women here in Japan , away from their homes , that are here for the defense of Japan , '' he said . American military officials on Okinawa , which lies south of the main Japanese islands , were trying to deal with the fallout from the situation . `` It is extremely regrettable when an alleged incident like this occurs , '' said Col. Brian McDaniel , vice commander of the 18th Wing of the U.S. Air Force , which occupies the Kadena base , the largest American military installation in the Asia-Pacific region . `` We are fully cooperating with Okinawan authorities on this investigation to ensure justice is served . '' Maj. Christopher Anderson , the head of public affairs for the 18th Wing , said he had met with the mayor of Yomitan on Friday . `` This is n't how we want our people to conduct themselves , '' he said of the airman 's alleged behavior . Japanese and U.S authorities declined to disclose details of the airman 's identity Friday , other than that he was assigned to Kadena . The issue of violent crimes by U.S. troops in Japan has divided the two countries for decades . It came to a peak in 1995 when a U.S. sailor and two U.S. Marines were convicted of raping a 12-year-old girl . Tens of thousands of Okinawans took to the streets at the time demanding that the United States leave the island . Relations between the U.S. military and the people of Okinawa have also been strained in recent months over the U.S. Marine Corps ' deployment of MV-22 Osprey tilt-rotor aircraft to a base on the island . Some Okinawa residents are concerned because the Osprey has had a reputation for crashing . The Okinawan community has long been against the presence of the U.S. military , which recently announced that thousands of Marines will be moved to a base in Guam .
`` It 's an understatement to say I 'm very upset , '' U.S. ambassador says . The United States has been trying for years to get the Syrian government and its allies to negotiate a political settlement in Syria. The alleged attack is `` outrageous , '' the Japanese foreign minister says . Two U.S. sailors were arrested last month over accusations they raped a local woman .