JACKSONVILLE, Fla. — A north Florida mother has pleaded guilty to shaking her baby to death after the boy's crying interrupted her game on Facebook.

Alexandra V. Tobias pleaded guilty to second-degree murder on Wednesday and remains jailed.

1. More U.S. news
   1. Beryl soaks Fla., Ga; thousands lose power

      The remains of Tropical Storm Beryl soaked beach vacations and some Memorial Day remembrance services in southern Georgia and northern Florida on Monday and knocked out power to tens of thousands, though emergency officials said it hasn't brought any major damage

   2. Dallas cops in standoff with man in crane
   3. Obama honors fallen troops on Memorial Day
   4. 1 dead, 4 hurt in paper mill explosion, fire
   5. Michigan wildfire destroys nearly three dozen homes

The Florida Times-Union reports that she told investigators she was angered because the boy was crying while she was playing the game FarmVille.

The paper also reports that she told investigators she shook the boy, smoked a cigarette to compose herself and then shook him again.

She will be sentenced in December. State guidelines call for 25 to 50 years, but a prosecutor said it could be shorter than that.

A telephone message and an e-mail sent by The Associated Press to her attorney weren't immediately returned.