Two weeks after revealing that city employees were using their computers to visit pornographic Web sites, Mayor Adrian Fenty’s regime has refused a request to explain what top aides to the mayor are doing with their computers.

The Examiner filed a Freedom of Information Act request Jan. 14, asking the city to explain what Web sites its top officials were visiting on their government-issued computers. Nine days later, Fenty called a news conference to announce he had fired nine employees for visiting pornographic Web sites and promised to crack down on the abuse of public computers.