NEWARK, N.J. — State Police have taken over security at New Jersey’s largest sewerage authority after a small hole was found drilled into the executive director’s office.

Officials say the hole would allow anyone to eavesdrop on Passaic Valley Sewerage Commission director Wayne Forrest from a storeroom below.

The embattled agency’s chief financial officer Kenneth Pengitore abruptly resigned from his $163,869-a-year job Wednesday. Forrest also fired five other employees, including the wife and brother of a former commissioner.

Forrest said the actions were necessary to restore public trust and accountability.

The resignation and terminations followed the arrests Tuesday of three top-level executives. They’re charged with official misconduct for allegedly using employees to perform personal home improvements and repairs during work hours.