WASHINGTON (AP) — Some workers at the National Security Agency intentionally misused the government’s secret surveillance systems at least 12 times over the past decade, including instances when they spied on spouses, boyfriends or girlfriends, according to embarrassing new details disclosed by the agency’s inspector general. In nearly every case, the workers were allowed to retire before they could be punished.

In addition to the 12 historical cases, authorities are investigating two other suspected violations and reviewing a third allegation for possible investigation, the inspector general, George Ellard, told Sen. Charles Grassley, R-Iowa, in a letter released late Thursday.