The number of people with measles in Texas increased to 146 in an outbreak that led this week to the death of an unvaccinated school-aged child, health officials said Friday.

A child died from the measles after being hospitalized in Lubbock, the first death amid an outbreak that began last month in the South Plains region, health officials said. The Texas Department of State Health Services confirmed the school-aged child's death on Wednesday but did not offer any additional details about the child's age or identity.