The Department of Justice revealed on Tuesday that nearly $7 million has been spent so far on the investigation into Russian meddling in the 2016 presidential election.
The costs cover a five-month period from May 17, when the Department of Justice appointed Robert Mueller as special counsel for the Russia investigation, to Sept. 30, the end of the fiscal year, CNN reports.
Deputy Attorney General Rod Rosentstein authorized the budget for the probe.
The expenditures can be divided into two main categories: approximately $3.2 million spent by Mueller, and an additional $3.5 million spent on other Department of Justice components to support the investigation, including investigators from the FBI.
Tuesday's revelation marks the first time the public has learned about how much taxpayer money has been spent on the Russia investigation.
Congress has also been investigating Russian interference in the 2016 election, with multiple congressional committees conducting their own probes in both the House and Senate.
Mueller's investigation has so far resulted in President Donald Trump's former national security adviser, Michael Flynn, pleading guilty to lying to the FBI about his contacts with the Russian ambassador to the U.S., and the indictment of Trump's former campaign manager, Paul Manafort, along with a longtime business associate.