LOS ANGELES, Aug. 23 — The New Mexico attorney general has reopened an investigation into whether the CBS reality show “Kid Nation” violated the state’s child-labor laws and other state regulations governing the welfare of children, a spokesman for the attorney general said on Thursday.

The spokesman, Phil Sisneros, said the attorney general, Gary K. King, ordered his department, which had halted its investigation of the show in late May after the production ended its two-month stay in the state, to “go back and look at this and see if there were any problems” with the program.

A parent of one child who appeared in the program complained about injuries and working conditions at the site.

Officials at two agencies — the New Mexico Children, Youth and Families Department and the Department of Workforce Solutions — also said that state law required that the show be reviewed and licensed but that CBS never contacted those departments before filming.