The board's executive summary, which was obtained yesterday by The Associated Press, said that "there was a reasonable likelihood that the killings were committed after consultation with other local tribal actors."
Michael Sharp of the United States and Zaida Catalan, a dual national of Sweden and Chile, disappeared March 12 and their bodies were discovered in shallow graves March 27.
The five-page summary noted that information is circulating about the possible involvement "of various government individuals or organisations" in the killings.
"This does not provide proof of intent or motive" by anyone, or preclude "that others are involved," the board said.
Also Read
The board said additional investigations, including by national authorities, "may provide greater clarity on this issue."
"Since Congolese security forces may have been responsible for the killings, the Congolese government cannot be relied on to find the killers," Sawyer said. "Guterres should set up a UN investigation to uncover the truth and help US and Swedish authorities as they work to build cases against those responsible for this heinous crime," she said.
Disclaimer: No Business Standard Journalist was involved in creation of this content