Myanmar's government has denied the allegations.
Members of Myanmar's security forces will face legal action over the hacking and shooting deaths of Rohingya Muslims in restive Rakhine state, a government spokesman said.
The arrests were "not because of Reuters news".
"As more evidence comes out about the pre-planning and intent of the Myanmar armed forces to wipe out Rohingya villages and their inhabitants, the global community ... needs to focus on how to hold the country's military leaders accountable", said HRW's deputy Asia director Phil Robertson. Buddhist villagers attacked some of them with swords and soldiers shot the others dead, the military said, adding that it would take action against those involved.
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After he reads part of the text exchange in the "over the top" accent, his co-hosts played audio of Yee himself. "I want to publicly apologize to Don and anyone in the audience who heard it", Fauria wrote.
Infrared satellite image shows an aerial overview of the village of Gu Dar Pyin, Myanmar, another village with mass graves like those in Inn Din.
Almost 690,000 Rohingya have fled Rakhine state and crossed into southern Bangladesh since August, when attacks on security posts by insurgents triggered a military crackdown that the United Nations has said may amount to genocide.
Yanghee Lee, the United Nations human rights investigator for Myanmar who has been barred from visiting the Rohingya areas, echoed that call and added in a tweet: "Independent & credible investigation needed to get to the bottom of the Inn Din massacre".
Prosecutors are seeking to charge Wa Lone and Kyaw Soe Oo under Myanmar's Official Secrets Act, which dates back to the time of colonial British rule and carries a maximum 14-year prison sentence.
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The Turkish president said, "We might lose a helicopter but they'll pay the price for this". Turkey continued its operations Sunday, targeting YPG areas with air and artillery strikes.
The Reuters report said witnesses denied there had been any major attack from Rohingya militants before the alleged massacre. "And we are not giving blanket denials".
The Foreign Secretary met with Myanmar leader Aung San Suu Kyi on Sunday where he called on her to help thousands of displaced Rohingya return to their homes in Rakhine State.
"It is vital the public knows what happened and the world knows what happened in Rakhine and who was responsible", Secretary of State for Foreign Affairs Boris Johnson told Reuters in Kutupalong refugee camp in Bangladesh.
Their plight has sparked global alarm over withering press freedoms in Myanmar and government efforts to curb reporting in northern Rakhine state - where troops are accused of waging an ethnic cleansing campaign against Rohingya Muslims.
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In the story, Myanmar said its "clearance operation" is a legitimate response to attacks by insurgents.