The Eels are poised to stave off further poaching raids for teen prodigy Dylan Brown as the NRL confirmed it will probe New Zealand Warriors over an attempt to lure the youngster across the Tasman.

The Herald understands the Eels are advanced in talks to upgrade and extend 18-year-old Brown's contract with the blue and golds, which expires at the end of 2020.

Extended stay: Dylan Brown. Credit:NRL Photos

The Warriors tabled a lucrative offer to Brown to fill the void left by Shaun Johnson's exit, a move which could have breached the NRL's anti-tampering guidelines given he still has two years to run on his meagre deal with Parramatta.

The Warriors insist they were initially told by Brown's management he was a free agent at the end of 2019 and backed down in their pursuit when his contract status was later clarified. There is no suggestion of wrongdoing on behalf of Brown or his management.