After the league spoke with Griffin about the incident Friday, the Clippers were under the impression that the investigation was over and an announcement on any discipline for Griffin would be made early next week.
But a league source said the NBA is still looking into the situation and there is no timetable for an announcement. An ESPN report earlier Saturday stated that the NBA's investigation had been completed.
The league's interview of Griffin completed a week in which it had spoken with the four Clippers' players and staffers present at the incident: center DeAndre Jordan, assistant equipment manager Matias Testi and assistant athletic trainer Joe Resendez were the other three.
Griffin was involved in an altercation with Testi on Jan. 23 at a Toronto restaurant. Griffin broke his hand punching Testi after the two got into an argument.
Testi is expected to rejoin the Clippers for the team's four-game road trip beginning Friday in Orlando, Florida, sources said. He is in no danger of losing his job, sources said.
Griffin is not expected to travel with the team on the road trip but could rejoin the Clippers for their first game after the All-Star break, which will be Feb. 18 against the San Antonio Spurs. The team expects him to miss up to two months because of the spiral fracture in the fourth metacarpal in his right hand.
Clippers coach Doc Rivers offered support for Griffin on Friday.
"He feels awful about it, and he's let everyone know that," Rivers said. "That's all you can do. You have to forgive people at some point. I believe that. We built Richard Nixon a library. I mean, my goodness, you forgive people. You really do. You kind of move on, and you build it back."
Information from ESPN staff writer Kevin Arnovitz and The Associated Press contributed to this report.