Federal and city law enforcement officials conducted searches at various locations across the city on Wednesday morning as part of an ongoing corruption investigation. The inquiry is reportedly focused on alleged wrongdoing within the New York Police Department, the nation's largest, and is targeting current and former police executives.

The FBI and the New York Police Department's Internal Affairs Bureau were involved in the searches, according to sources familiar with the investigation. While the exact scope of the probe remains undisclosed, sources indicated it is examining the processes surrounding promotions and assignments within the department.

FBI agents were observed outside the Brooklyn home of Jeffrey Maddrey, who previously held the position of Chief of Department, the highest-ranking uniformed officer in the NYPD. The searches signify a significant development in the federal and local effort to uncover potential corruption at senior levels of the police force.

This investigation could have broad implications for the NYPD's leadership and internal policies. The focus on promotions and assignments suggests a potential examination of favoritism or illicit dealings in career advancement within the department. Further details are expected as the investigation progresses.

Sources stated that the investigation is looking into various aspects of the department's operations, with a particular emphasis on how promotions and assignments have been handled. The involvement of both the FBI and the NYPD's internal affairs underscores the seriousness and breadth of the inquiry.

While specific details about the individuals or the exact nature of the alleged corruption have not been officially released, the targeting of former and current high-ranking officials indicates a potentially wide-reaching case. The public will be looking for transparency and accountability as this developing story unfolds.

The probe's examination of promotions and assignments could lead to a review of past departmental decisions and potentially impact current personnel. Law enforcement officials have not commented publicly on the ongoing searches or the investigation's specifics.

This is a developing story, and ABC News will provide updates as more information becomes available from official sources and those close to the investigation.