Ministerial talks on putting together the U.S-led Trans-Pacific Partnership will take place May 19 and 20 in Singapore, a top U.S. official said Wednesday.

Ahead of the Singapore meeting, chief negotiators from the United States, Japan and 10 other members in the initiative will meet in Vietnam next week, Wendy Cutler, acting deputy U.S. trade representative, said in Washington.

"We'll keep pushing to achieve the best possible deal we can achieve. This is hard work and negotiating a deal among 12 parties adds additional complexities, but opportunities as well," Cutler said.