The US military is cooperating with Japanese police investigating allegations that two US sailors raped a woman on Okinawa.
The incident has sparked protests from the Japanese government and an outcry on Okinawa, which hosts more than half the US bases in Japan.
Commander Kenneth Marshall, a spokesman for the US navy in Japan, said military authorities are cooperating with and supporting the investigation by Okinawan police, who on Tuesday arrested the two sailors accused of raping the woman.
Marshall says the Naval Criminal Investigative Service has also launched its own investigation, although Japan has primary jurisdiction.
Seaman Christopher Browning and Petty Officer 3rd Class Skyler Dozierwalker, of Joint Naval Air Station, Fort Worth, Texas, were on Okinawa on a brief stopover.
