A Texas measles outbreak has doubled in the last week to 124 cases, state health officials said Tuesday, a day after they warned a person infected with the highly contagious disease had traveled from the outbreak zone.

A child hospitalized with measles in West Texas has died. It's the first death in an outbreak that began last month.

An unvaccinated child has died as the Texas measles outbreak reaches 124 cases. Public health officials also warn of potential spread in San Marcos and San Antonio.