Media reports of his departure are being circulated today (Thursday) and confirmation of the move are expected later.
In France, Pau were dealt a body blow when it was announced that their French international number eightImanol Harinordoquy had agreed a two-year contract with Biarritz.
The 24-year-old Harinordoquy had initially come through the ranks at Biarritz before signing for Pau in 1999.
"He is a great player and he's Basque which is a plus,"said Biaritz Chairman Marcel Martin.
"He's an ideal player for us. My dream would be to have 15Basque players at
Biarritz are in the play-offs of the French championships with asemi-final place at stake while Pau are in the relegation play-offs though thereis little danger of the drop into the second division.