Multiple FBI investigations are underway involving potential corruption charges against the Clinton Foundation, according to a former senior law enforcement official.

The investigation centers on New York City where the Clinton Foundation has its main offices, according to the former official who has direct knowledge of the activities.

Prosecutorial support will come from various U.S. Attorneys Offices — a major departure from other centralized FBI investigations.

The New York-based probe is being led by Preet Bharara, the U.S. attorney for the Southern District of New York. Bharara’s prosecutorial aggressiveness has resulted in a large number of convictions of banks, hedge funds and Wall Street insiders.

The official said involvement of the U.S. Attorney’s Office in the Southern District of New York “would be seen by agents as a positive development as prosecutors there are generally thought to be more aggressive than the career lawyers within the DOJ.”

Bharara’s official biography notes that he, “has applied renewed focus on large-scale, sophisticated financial frauds by creating two new units – the Complex Frauds Unit and the complementary Civil Frauds Unit.

“The Civil Frauds Unit has collected close to $500 million in settlements since its inception, including multi-million dollar settlements with Deutsche Bank and CitiMortgage for faulty lending practices and other fraudulent conduct.”