The FBI did not look over the Democratic National Committee's servers before issuing a report that Russia had hacked the organization, according to a report published Wednesday evening. Other than the FBI, no federal agency has conducted an investigation into the DNC's email server since the incident was uncovered six months ago.

"The DNC had several meetings with representatives of the FBI's Cyber Division and its Washington (DC) Field Office, the Department of Justice's National Security Division, and U.S. Attorney's Offices, and it responded to a variety of requests for cooperation, but the FBI never requested access to the DNC's computer servers," said Eric Walker, the DNC's deputy communications director, according to the report.

Instead, Director James Comey's agency has relied on third-party tech security company Crowdstrike to confirm the DNC's servers were hacked, a U.S. official said.

"Beginning at the time the intrusion was discovered by the DNC, the DNC cooperated fully with the FBI and its investigation, providing access to all of the information uncovered by CrowdStrike - without any limits," said Walker.

The FBI's decision not to directly investigate the DNC hack is an odd move for the agency. Cybersecurity experts told Buzzfeed it was "par for the course" for the FBI to do its own investigation into the hacks, rather than outsourcing the work to a non-government organization. When Sony Corporation was hacked by North Korea in 2014, the FBI personally looked into the private company's server even though it was not a government entity that had been compromised.

The news comes a week after President Obama imposed sanctions against Russia after an intelligence report conclude Russia was the bad actor behind the hacks.