There have also been a series of attacks by other unidentified groups on Ebola response centres.
In one incident, family members assaulted health workers who were overseeing the burial of their relative in May.
A 2018 study published in the Lancet medical journal says "belief in misinformation was widespread" concerning the Ebola outbreak in North Kivu.
One in four respondents believed in the statement that Ebola does not exist, with an even higher proportion saying the Ebola outbreak was fabricated for financial gain, or to destabilise the region.
"There's already been civil unrest in the region and that's exacerbated when a foreign response comes into an area that's heavily guarded," says Lara Salahi, an author who has written about responses to Ebola outbreaks.