The number of confirmed measles cases reported in an outbreak in West Texas is now at 124, the Texas Department of Health Services said in an update Tuesday, an increase of 34 since late last week.

Four of the newly reported cases are located in Dallam County, 200 miles north of Gaines County where the outbreak originated.

The measles outbreak in west Texas grew to 124 cases over the weekend, with 18 patients requiring hospitalization, the state’s health department said on Tuesday. The cases increased by 34 since Friday,