The American Association for the Advancement of Science has taken down its scientific press release website because of a “serious security breach.”

The AAAS posted an advisory on its website saying it was acting out of an abundance of caution.

“The integrity of content on our website is of the utmost concern to us,” the association said as it addresses “a serious security breach.”

The AAAS said it became aware of the situation Monday, two days after the breach that compromised usernames and passwords. The hack resulted in the early release of an embargoed EurekAlert! press release and the site was taken down to protect other embargoed material.

“Please be assured that financial information from subscribing institutions is not stored on the EurekAlert! website and therefore remained secure,” the advisory said.

The AAAS said the site will be brought back online as soon as possible, but not until “we can ensure that vulnerabilities have been eliminated.”

News of the hack follows other high profile invasions, including former Secretary of State Colin Powell’s emails, the latest WikiLeaks dump of Democratic National Committee emails and the records of top American athletes including the Williams sisters, Simone Biles and Elena Delle Donne. Dropbox also confirmed the login credentials of 68 million users had been hacked.

Fears also have been raised Russia is trying to influence the U.S. presidential election through hacking. Russian hackers are suspected of hacking the voter registration systems of Arizona and Illinois, and also have been blamed for hacking the Democratic National Committee emails.

NBC News reported Tuesday the U.S. is unlikely to retaliate publicly before the election, fearing tit-for-tat cyberattacks could be more damaging to U.S. interests as Washington seeks Moscow’s cooperation Syria and seeks to protect intelligence sources.