Raptors' GM Bryan Colangelo has turned down one National Basketball Association team interested in speaking with his head coach Sam Mitchell.

Mitchell's contract expires June 30 and Colangelo said yesterday talks are under way to sign the NBA coach of the year to an extension.

One team officially sought permission to speak to Mitchell, but was denied. Another team asked informally about a timeline that needed to be followed.

"The response was basically I'm not prepared to release Sam to speak to other teams at this stage," Colangelo remarked. "It's far too early in the process and we're not at that point yet."