Police in New York are investigating threats made over Twitter directed towards New York Islanders defenceman Nick Leddy.

A Twitter user, whose account has been suspended, posted images of Leddy’s driver’s licence and a credit card with his name on it, along with several threatening messages.

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

A source told Yahoo! Sports that Leddy had been receiving harassing messages for months. As of Wednesday morning it’s unknown whether or not the person making the threats has been identified.

Leddy was acquired in a trade with the Chicago Blackhawks prior to the season and signed a seven-year, $38.5-million contract extension with the Islanders in February.