A Georgia-based probe into whether former Republican President Donald Trump and others illegally sought to overturn his loss in the state’s 2020 presidential election has expanded into activities outside of Georgia, the Washington Post reported on Friday.

Fulton County’s prosecutor has broadened the two-year-long investigation to include Trump’s campaign “hiring two firms to find voter fraud across the United States and then burying their findings when they did not find it,” including issuing a subpoena to one of the companies, the Post reported, citing two people with knowledge of the probe.