Danny Fenster, an American journalist who was arrested in May as he prepared to leave Myanmar, was ordered Monday to remain in prison as police investigate a vague accusation that he disseminated information that could be harmful to the military, The New York Times reported.

The court hearing marked his 120th day in custody. Mr. Fenster is the only American known to be under arrest in Myanmar.

No formal charge has been filed and no evidence presented against him at any of his eight court appearances, which are conducted by video and last only a few minutes. He is not permitted to speak or ask questions and has rarely met with his attorney since his arrest on May 24.