The World Health Organization is asking its scientific experts not to share documents related to its findings on glyphosate.
The WHO’s International Agency for Research on Cancer (IARC) distributed a report in early 2015 calling the weed killer “probably carcinogenic.”
Makers of the product say the claim is false, citing their own research into the product. Since then, several groups using Freedom of Information Laws have asked for documents related to how the IARC decision was made, including scientists on the panel that live and work in the U.S. at U.S. institutions.
In response, the WHO said those documents pertaining to glyphosate research are private and its own property.
Reuters reports some parties are considering a lawsuit seeking to clarify whether that’s the case and if it’s subject to U.S. FOIA laws.
Glyphosate is the key ingredient of Roundup, which is sold by Monsanto.