NEW YORK (CBSNewYork) — The New York Islanders say that authorities are investigating a series of hostile tweets directed at defenseman Nick Leddy.

The Nassau County Police Department and FBI were notified on Tuesday after a Twitter user “made violent threats” and posted a photo of Leddy’s driver’s license, Newsday reported. Other tweets included a photo of his MasterCard and “images of an unidentified woman posing with Leddy, with derogatory words written over her face and body,” according to Yahoo Sports.

READ MORE: Storm Watch: Officials Hoping To Avoid Repeat Of Ida With Preparations For Nor'easter

“We alerted local and federal authorities immediately, as well as the NHL,” an Islanders spokesperson told Newsday. “They’re investigating the matter. Nick and his family are safe.”

READ MORE: NYPD: Man Shot Inside Union Square Subway Station

The account — which has been suspended — was targeting Leddy for months prior to Tuesday’s escalation and it’s unclear whether the user was identified, the newspaper reported.

Leddy was acquired from Chicago in October. He signed a long-term extension to stay with the Islanders last month.

MORE NEWS: Exclusive: CBS2 Cameras On Hand At Unannounced Security Screenings At Troubled New York City High Schools

The 24-year-old Minnesotan played over 26 minutes in Tuesday night’s loss to his hometown Wild.