LOS ANGELES -- Two former NBA referees told ESPN on Thursday that federal investigators had questioned them about referee Dick Bavetta while conducting their probe into Tim Donaghy.

Former referee Hue Hollins said Thursday on ESPN's "Outside The Lines" that federal investigators "questioned me about Dick Bavetta more than they did about Tim Donaghy."

"They wanted to know what I knew about Dick Bavetta in terms of holding calls, making sure this team wins, that team wins. I said 'I never heard of that, and I didn't know anything about it,'" Hollins said. "When they called to interview me, I was again caught by surprise they asked so many questions about Bavetta. I didn't know where they were going with that."

Another ex-referee, who spoke to ESPN.com on the condition he not be identified, said federal investigators asked him about specific games Bavetta refereed and whether he had noticed anything peculiar about Bavetta's actions.

NBA commissioner David Stern called a news conference prior to Game 4 of the NBA Finals and said he had no concerns about Bavetta.

Stern also said the league would reinterview all its officials, all of whom were asked in interviews with independent investigator Lawrence Pedowitz whether they had ever made a call based on anything other than the merits of the call itself.

The Pedowitz report has been in the league's hands for several weeks, but the NBA has said it will not release the report until Donaghy is sentenced and that investigation is closed.

Stern answered "I don't know" when asked how much Bavetta-related questioning had taken place during interviews between referees and federal investigators, although he acknowledged that the NBA was aware that questions were being asked about Bavetta.