Yahoo Inc. said Wednesday that it's buying Citizen Sports Inc., a provider of sports news and information to social networking sites and cell phones.

Terms of the deal were not disclosed.

Yahoo said its sports content will be integrated into Citizen Sports' services. The acquisition strengthens Yahoo's presence online and on mobile phones, creating more advertising opportunities.

Citizen Sports lets people check live scores, read sports news, play fantasy sports and fill out brackets on cell phones or without having to leave their social networking sites.

The six-year-old San Francisco company delivers high school, college and professional sports information to Facebook, MySpace, hi5, and iPhone and Android-based phones.

Yahoo expects to close the deal in the second quarter.

Shares of Yahoo, based in Sunnyvale, Calif., rose 14 cents to close at $16.50.