At least 124 cases of measles have been identified in Texas since late January, mostly among children and teenagers who are either unvaccinated or whose vaccination status is unknown, officials say.

A child who was hospitalized with measles has died from the illness in West Texas, state and local health officials announced Wednesday. It is the first death in a measles outbreak that has infected more than 120 people since late last month.

The measles outbreak in Texas has now turned deadly. Texas and federal health officials have just reported the first deaths attributed to the still-growing outbreak, which has sickened over a hundred people.