Danny Fenster, a U.S. journalist who has spent more than four months in pretrial detention, has been charged with a second criminal offence, his lawyer said Monday, while authorities refused to disclose the reason behind his arrest.

Danny Fenster has been charged under the Unlawful Associations Act, said lawyer Than Zaw Aung. He was already charged with incitement for allegedly spreading false or inflammatory information. That offence is punishable by up to three years in prison.

Asked last week about the reason for Fenster’s arrest, government spokesman Maj.-Gen. Zaw Min Tun responded: “As for journalists if they do only journalist’s work, there is no reason to arrest them. Danny Fenster did more than just what a journalist does.″