Three top U.S. Transportation Security Administration managers at Pittsburgh International Airport, including Federal Security Director Robert Blose, resigned jobs today amid an internal investigation triggered by complaints of intimidation, fraud, and sexual harassment by some employees.

Blose, Craig Martelle, assistant federal security director of screening, and Bill Rough, deputy assistant federal security director for screening, cited personal reasons in submitting their resignations.

The resignations came less than a week after a peer review board, which included other federal security directors, met to consider the findings of an internal investigation and a separate management review and to make recommendations to the TSA leadership, including David M. Stone, assistant secretary of homeland security for the TSA.

TSA officials would not say what recommendations the board had made or what action, if any, awaited the three if they had not resigned. George Naccara, TSA northeast area director who has oversight of operations at Pittsburgh International Airport, said that the resignations "were not required. The three of them requested resignations.

"They all resigned on their own free will here for personal reasons," he said.

Effective immediately, Thomas Rice, who had been federal security director at Port Columbus International Airport, will serve as acting federal security director in Pittsburgh until a permanent replacement is found. That search could take months.

Blose had been federal security director in Pittsburgh since 2002.