At least three more Secret Service agents were expected to lose their jobs Friday as a result of the Colombia prostitution scandal, a federal official told the Associated Press.
Meanwhile, NBC News reported the number of firings could be as high as five.
Three agents have already left the Secret Service amid the fallout.
A total of 11 Secret Service agents were placed on leave last week amid revelations that at least some brought prostitutes back to their Cartagena, Colombia hotel ahead of President Barack Obama's arrival for a summit. The scandal came to light after a dispute one of the agents had with a woman over her payment.
Also on Friday, the Pentagon said an 11th military person was involved in the scandal, up from 10 as had been previously reported.
Update: Three Secret Service agents resigned Friday, raising the total number of agents to leave their positions because of the scandal to six.
Additionally, Secret Service Agency Director Mark Sullivan personally briefed Obama on the situation in the Oval Office.