A child in West Texas has died of measles, state health officials said on Wednesday, the first reported U.S. death from the highly contagious disease in a decade, as a Texas outbreak has grown from a handful of cases to more than 130 across two states.

Texas officials on Wednesday announced the first measles death in the state's ongoing outbreak of the highly contagious disease. The death, of a school-age child, is the first measles death in the U.S. since 2015, according to the Centers for Disease Control and Prevention.

At least 124 cases have been identified in Texas since late January, mostly among children and teenagers who are unvaccinated or whose vaccination status was unknown.