Published: Apr 01, 2011 7:23 AM EDT
Updated: Apr 01, 2011 4:30 AM EDT

SINGAPORE (AP) — A U.S. trade representative says negotiations for a Pacific Rim free trade agreement made very good progress this week in Singapore.

Barbara Weisel told reporters Friday after the sixth round of talks on the Trans Pacific Partnership that negotiators from nine countries hope to make substantial progress by the next APEC summit in November.

Weisel declined to say when negotiations could be completed. Weisel said discussions on some issues haven't begun yet.

Australia, Malaysia, Peru, the United States, and Vietnam are seeking to join a trade bloc of Brunei, Chile, New Zealand and Singapore to form the Trans Pacific Partnership, or TPP.