By Shoon Naing and Simon Lewis
NAYPYITAW (Reuters) - Myanmar's top court on Tuesday rejected the appeal of two Reuters reporters sentenced to seven years in jail for breaking the Official Secrets Act, in a landmark case that has raised questions about the country's transition to democracy.
"They were sentenced for seven years and this decision stands, and the appeal is rejected," Supreme Court Justice Soe Naing told the court in the capital, Naypyitaw, without elaborating.
Wa Lone, 33, and Kyaw Soe Oo, 29, have spent more than 16 months in detention since they were arrested in December 2017 while working on an investigation into the killing of 10 Rohingya Muslim men and boys.
Lawyers for the reporters had appealed to the Supreme Court citing lack of proof of a crime and evidence that the pair were set up by police. A policeman told a lower court last year that officers had planted secret documents on the two reporters.
A district court judge in Myanmar's largest city, Yangon, found the two journalists guilty under the Official Secrets Act last September and sentenced them to seven years in prison. The Yangon High Court rejected an earlier appeal in January.
The reporters’ imprisonment has sparked an outcry from press freedom advocates, Western diplomats, and world leaders, adding to pressure on Myanmar leader Aung San Suu Kyi, the Nobel laureate who took power in 2016 amid a transition to democracy from military rule.
U.N. investigators have called for high-ranking military officials to be prosecuted for crimes against humanity and genocide over a 2017 crackdown on the Rohingya in response to militant attacks in the western part of the country.
The investigation that the journalists were working on, which uncovered security forces' involvement in killings, arson and looting, was completed by colleagues and published in 2018. Last week it was awarded the Pulitzer prize for international reporting.
Both men are being held at Yangon's Insein prison, separated from young families. Wa Lone’s wife, Panei Mon, gave birth to their first child last year.
(This story corrects paragraph 6 to add dropped word "democracy".)
(Reporting by Shoon Naing and Simon Lewis; Editing by Neil Fullick)