MOUNTAIN VIEW, Calif. - Technical problems at Google are preventing an unknown number of people from using its Internet search engine, email and other services.

In a post on its website, the company reports that a "small subset of users" hasn't been able to get into their email accounts. Without elaborating, Google says the email trouble might be affecting other services as well.

Multiple messages posted on Twitter, a popular information-sharing forum, indicate that people all over the world are having trouble with the Google search engine and email.

But other Twitter users say their Google services have been running smoothly.

Google says the company is working to fix the problems.