A technical glitch in the U.S. State Department’s global database for issuing travel documents is causing major delays for those around the world applying for a U.S. visa or passport, according to Washington Post and Associated Press reports.

It is not clear when travelers may expect the delays to be resolved. Companies with employees who frequently travel internationally should keep tabs on the resolution of the problem. Foreign national employees who have upcoming plans to renew their U.S. visas while abroad should likewise be aware of potential delays. However, Americans re-entering the U.S. with a valid U.S. passport should not be affected.

The State Department reported on its website that, as of July 27, it is working on restoring the system to full functionality. While the system is down, immigrant cases, including adoptions visas, will be prioritized.

Although the number of individuals directly affected is unknown, it could be great as the agency processes millions of visas and passports each year.