Social media threats made to Islanders defenseman Nick Leddy Tuesday prompted local and federal authorities to open an investigation, the team said.

A now-suspended Twitter account posted pictures of Leddy's Minnesota driver's license and a credit card and made violent threats against the Islanders' defenseman and the team's security director contacted the Nassau County police as well as the FBI.

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"We alerted local and federal authorities immediately, as well as the NHL," a team spokesperson said. "They're investigating the matter. Nick and his family are safe."

Leddy, 24, has been on the receiving end of harassment from the same account for several months, with photos posted as well featuring Sydney Esiason, Boomer's daughter and girlfriend of Islanders forward Matt Martin, along with another woman who is not romantically involved with Leddy.

The threats turned violent Tuesday and it was not known as of Tuesday night whether the person making the threats had been identified.

Leddy was traded to the Islanders from the Blackhawks on Oct. 4 and signed a seven-year, $38.5 million contract extension on Feb. 24.