On the heels of a massive outage that has left some Yahoo Mail users without email access since Monday, Yahoo's photo-sharing platform Flickr temporarily crashed.

Many Flickr users were unable to access the site for nearly two hours on Thursday, starting at about 11 a.m. ET, but it was inaccessible worldwide for 10 minutes.

Flickr's signature "Bad Panda" error message (see below) appeared for some, while others were told it couldn't load due to "inactivity timeout."

"Flickr was unavailable for a very short amount of time and this issue has been resolved. We’re sorry for any inconvenience this may have caused," a Yahoo spokesperson told Mashable.

The Flickr outage is "not related to the Mail issue," the spokesperson added.

The timing of the crash couldn't be worse, as Yahoo tries to rebound from a hardware issue at a mail data center that kicked the email platform offline for days. Some users haven't been able to access their accounts since Monday.

As of Wednesday night, Yahoo said in a blog post it delivered over 30% of messages sent during the outage. It also said some users started experiencing email issues as far back as Nov. 25.

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"For some of you, emails between Nov. 25 and Dec. 9 may not be showing up in your Inbox — we're still working on bringing all accounts up to date," the company said. "Again, we’re sorry for the inconvenience this is causing."

Yahoo is working on restoring IMAP and POP access for users accessing email through a non-Yahoo app, such as Outlook or the native mail app on smartphones.

According to multiple posts on a Yahoo message board forum, outraged users have threatened to abandon the service in favor of joining Gmail.

Image: Emmanuel Dunand/Getty Images