Making movies is a scrappy business these days, so it’s perhaps unsurprising that an alleged fight broke out on the set of director Alfonso Cuarón’s latest film. The still-untitled picture — Cuarón’s first in Mexico since 2001’s Y Tu Mamá También — follows his 2013 lost-in-space saga Gravity. Reportedly, the brouhaha happened when Cuarón himself was absent from set and took place between members of B-unit crew and locals who attempted to halt production. Apparently, these locals claimed to be officials; however, a letter obtained by Deadline calls them thieves, and says they took jewelry and other possessions from crew members. The letter also accuses them of assaulting several crew members, including women, some of whom were sent to the hospital. On IMDb, the film in question is described as “a story that chronicles a year in the life of a middle-class family in Mexico City in the early 1970s.” Cuarón has not yet commented publicly on the incident, and as of press time, production on the film continues.