EurekAlert — a scientific news source that hosts embargoed journal articles — has suffered a serious security breach and is now temporarily offline.

EurekAlert is the news service operated by the American Association for the Advancement of Science. It holds science-related releases and papers from hundreds of institutions, including top journals such as the New England Journal of Medicine and the Journal of the American Medical Association. Both these journals are major publishers for clinical drug trials.

The website was attacked on September 9th, according to AAAS. The breach has affected usernames and passwords, but no financial information. One embargoed press release was publicly released, and the website is down to avoid other embargoed material from being released.

AAAS is now working to create a secure password-reset system. AAAS chief communications officer Ginger Pinholster told The Verge via email that the IT repairs are continuing and that “there is a concern about not compromising our security efforts going forward.”