Federal agents conduct a criminal investigation tied to allegations of voter fraud in downtown Los Angeles, including claims involving people living on Skid Row. Multiple reports say agents arrive on Thursday morning as part of the probe and focus on claims that some homeless residents were paid cash to sign multiple voter registration forms and were involved in alleged forgery and completion of registration materials. One account describes a sizable operation, with roughly 20 agents appearing in the Skid Row area. Another outlet characterizes the effort more generally as an FBI probe into a criminal matter. The reports link the investigation to the Los Angeles mayoral election, but they do not provide details about any arrests, charges, or named suspects in the accounts provided. Both sources focus on the existence of an FBI-led investigation and on allegations from residents about alleged payments and paperwork irregularities related to voter registration. As reported, the inquiry is ongoing and the specific scope of any subpoenas, interviews, or evidence being collected is not detailed in the provided excerpts.