Measles cases in the United States climbed to 939 in 29 states, the Centers for Disease Control and Prevention said Friday.

Measles cases in Texas rose 3% to 683 over three days, the state's health department reported on Friday, as nationwide cases of the childhood disease approach the 1,000-mark.

There have been four measles cases reported in the Dallas-Fort Worth area this year: one in Collin County, one in Denton County and two in Rockwall County. State authorities have not officially tied any of those cases to the outbreak that began in Gaines County, and all four appear in the state public health department’s list of “other 2025″ cases.