Issues with a cloud storage service operated by Amazon.com Inc.'s AMZN, -1.78% Amazon Web Services division caused outages and curtailed functionality for websites and apps Tuesday. AWS's S3 service, described by Amazon as "designed to deliver 99.999999999% durability," was experiencing "high error rates" due to problems with servers located on the East Coast of the United States, the company said Tuesday. On the AWS status page, engineers posted at 11:35 a.m. Pacific time, "We are working hard at repairing S3, believe we understand root cause, and are working on implementing what we believe will remediate the issue." Reported issues included downed websites -- such as IsItDownRightNow.com, which tracks website outages, the Securities and Exchange Commission's Edgar database of filings and Q&A site Quora.com -- slow functionality and photos not appearing in cloud-based mobile applications and websites.