With the NBA's new collective bargaining agreement still not finalized, the league's free agent signing period was delayed indefinitely Wednesday.

The league sent a memo to its 30 teams saying they will not be able to sign free agents on Friday, which was the original target date established by the league and the players' union for getting the new six-year labor deal into writing.

NBA official Tim Frank said no new target date was set, but a spokesman for the union said he expected the agreement to be finalized and free agents to begin signing by the middle of next week.

"We continue to make progress going through the issues. The goal is to have everything agreed to by July 22, then to draft the documents," union spokesman Dan Wasserman said.

Teams have been negotiating with free agents for nearly three weeks, and many of the most prominent players have already reached tentative agreements on new contracts.