A problem that affected account access for some Facebook users on Wednesday has been fixed, Facebook said via its Twitter feed.

"We've fixed the issue with a third-party networking provider, and anyone impacted should be able to access Facebook normally," the company said.

Facebook did not say what the problem was or which company caused it. The social networking company also did not give figures for the number of people affected by the problem.

Users had trouble accessing Facebook on Wednesday due to a problem the site was having with a network provider, the company said.

"Some people can't connect to Facebook because of an issue with a third-party network provider. We're working to fix it ASAP," Facebook wrote in a Twitter message yesterday.

That message followed user complaints that started popping up on Twitter earlier in the day.

Facebook did not at the time respond to a request for details about the issue or about how many people have been affected. In a statement, it said it is in contact with the network provider "to explore what can be done to resolve the issue." Facebook also said it is working on ways to bypass the affected connections.

Facebook seems to have less frequent outages than Twitter, a rival in social networking. However, it had one notable failure last year, when around 150,000 people were unable to use the site for more than a week.

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