The NRL has asked the Penrith Panthers for information over a string of vile social media posts aimed at State of Origin star-in-waiting Bryce Cartwright.

The messages posted about the 22-year-old on Twitter, some of which had photos attached, started on Sunday.

Social media storm: Bryce Cartwright. Credit:Getty Images

The account was suspended but the NRL Integrity Unit is believed to be in possession of the messages and has already spoken to the Panthers, who count Cartwright as arguably the best prospect in a club laden with future internationals.

"The NRL Integrity Unit is aware of online activity relating to Bryce Cartwright and has asked the Penrith Panthers for further information," an NRL spokesman said.