In an email sent to players of the Milwaukee Bucks on Wednesday night, the franchise termed the issue as a “serious security incident” and took responsibility for an employee distributing 2015 IRS W-2 documents in an email scam in which team president Peter Feigin was impersonated, sources said.

The W-2 information included names, addresses, Social Security numbers, compensation information and dates of birth. 

The NBA and NBPA have been involved in investigating.

Player representatives with clients on the Bucks during the 2015 fiscal year are working to secure the safety of their players’ finances.

“The communication received on this major security breach is unacceptable,” one agent with a client on the Bucks told The Vertical. “The players need to know the exact measures being taken by the Bucks and the FBI to ensure each and every player's identity and financial information will not be compromised. There needs to be accountability for such a mistake, details on the steps taken to rectify it and a process put in place to make sure this never happens again.”