A report by the Department of Homeland Security's Inspector General has concluded that two senior Secret Service agents were "more likely than not" impaired by alcohol when they drove an official car through a secure area outside the White House this past March.

The report, which was released late Wednesday, concludes that Marc Connolly and George Ogilvie spent about five hours at a bar during and after a retirement party for a colleague and ran up a "significant" bar tab before driving to the White House on March 4. Their tab included eight glasses of scotch, two vodka drinks, three beers and a glass of wine.

Connolly, the deputy special agent in charge of the Presidential Protection Division, announced his retirement earlier Wednesday in advance of the report's release. Ogilvie, the assistant special agent in charge of the agency's Washington field office, has been placed on administrative leave.

Both men denied being drunk and told investigators they only had a few of the drinks over the course of the night. Ogilvie said some of the drinks on his tab, including five glasses of scotch, were given to other people at the bar, though he could not recall who received the drinks.

Secret Service Director Joseph Clancy said Wednesday he was "disappointed and disturbed at the apparent lack of judgment described in this report. Behavior of the type described in the report is unacceptable and will not be tolerated."

DHS Inspector General John Roth said in the report that Ogilvie was driving and Connolly was his passenger when Ogilvie drove his government-owned vehicle into a secured zone where on-duty Secret Service officials were investigating a suspicious package that had been left in the White House complex by a fleeing driver.

Ogilvie "had to do considerable maneuvering" as he drove slowly through the area and pushed a larger construction barrier about five feet with the bumper of his vehicle. Clancy, who was not told about the incident for several days, previously told lawmakers that the agents "nudged" the barrier as they drove into the White House complex.

Roth's report said "this was no mere `bump,' but rather extended contact to shove the barrel out of the way."

The report said the pair also unwittingly drove within inches of the suspicious item as they made their way through the secured area.

Roth said officers at the scene didn't smell alcohol on either Ogilvie or Connolly, but three officers thought something was "not right" about the pair. A watch commander was later told by an officer that "they may be drunk."

No field sobriety tests were given that night and both men were allowed to drive their government vehicles home from the White House.

Roth concluded that both agents "displayed poor judgment and a lack of institutional awareness" and "more likely than not both Connolly and Ogilvie's judgment was impaired by alcohol."

Roth also found that "it would have been far preferable" for the watch commander on duty that night to question the men further about their sobriety or ordered a field sobriety test.

The Associated Press contributed to this report.