U.S. Senator John McCain, chairman of the Senate Armed Services Committee, said in a statement that he was “concerned and disappointed” by the decision to close the NDI.
The announcement on Wednesday comes amid a broad crackdown on non-governmental groups and critical media outlets ahead of a crucial general election next year, rights groups have said.
The paper was handed a $6 million tax bill earlier this month and given until September 4 to pay or face closure, the seizure of its assets and suspension of its license to operate.
A State Department spokesperson said Washington was in talks with the government in the hope it would approach the disputes “in a fair fashion”.
In the report, CNN interviewed three Cambodian nationals of Vietnamese ethnicity who were identified as Cambodian in the report, prompting the criticism from the government.
U.N. Rights envoy Rhona Smith expressed her support for Vanny’s cause, adding that the U.N. had written several letters to the government and was awaiting a response.
Meas Rithy claimed he “had no bad intentions” when he made the comments and was “just joking” and “educating women”.
The Boeung Kak activists also submitted a petition to Rhona Smith, the U.N.’s rights envoy to Cambodia, who is in the country on a fact-finding mission.
Rhona Smith began her 10-day visit to Cambodia on Tuesday and is scheduled to meet with more government officials in the coming days.
The protest Tep Vanny helped lead was held to demand compensation for victims of forced eviction, but it turned violent when guards refused to allow protesters to deliver a petition.
Sentence is latest blow to Cambodia's opposition, which has accused the government of intimidating its activists and using the judiciary to silence critics.
Publishers and filmmakers have raised public awareness about social issues for decades; video game makers now hope to reach the younger digital generation in the same way.