The US Forces in Japan will pause operations for 48 hours starting noon on Wednesday and impose a month-long curfew on military personnel, following the arrest of a US Marine on suspicion of murdering a Japanese woman.

US military personnel on Japan’s southernmost island of Okinawa will cease operations for training on standards and discipline, and will be forbidden from leaving their bases to socialize or consuming alcohol, according to a statement.

“Serving on Okinawa comes with responsibility,” the statement read. “Every interaction with our neighbors either builds or undermines the trust that is essential to our team. When that trust is damaged, it affects the strength of our alliance and the security of this region.”

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Following the operational pause, military personnel will be subject to a midnight curfew for a 30-day period, the statement added.

Local police arrested a 20-year-old US serviceman on suspicion of killing 39-year-old Anna Yagi early Saturday at a hotel in the city of Naha. National broadcaster NHK said the serviceman denied the charges, citing police investigators.

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The incident threatens to reignite local opposition to the US military presence on Okinawa, where around 30,000 American service members are based.

The rape of a 12-year-old Okinawan ⁠girl by three US troops in 1995 triggered major protests, and serious crimes involving US military personnel since then have periodically stoked opposition to the American military presence on the island.

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“The latest case creates deep unease among the Okinawan people and is entirely unforgivable,” said Okinawa Governor Genta Koja ahead of a meeting with Defense Minister Shinjiro Koizumi in Tokyo. “This is the result of a failure of human rights training by the US military, given this happened despite repeated requests from the Okinawan side to ensure similar cases are prevented.”

Koja only became governor last month after a campaign noted for its lack of focus on the relocation of US bases in the prefecture.

Koizumi said he had lodged a protest with the US and strongly called for preventative measures.

“I feel deep frustration that such a heinous and deplorable crime has occurred, and an American serviceman was arrested in relation to it,” Koizumi said. “I hope to push forward discussions between Japan and the US on what measures will be effective in preventing such cases in the future.”