VIENNA, MAY 15 (AP/UNB) - Negotiators for the U.N. nuclear agency and Iran say they have made progress in talks focused on the agency's probe of Tehran's alleged work on nuclear weapons.

International Atomic Energy Agency chief negotiator Herman Nackaerts and Iranian envoy Ali Asghar Soltanieh told reporters Tuesday that the two sides will meet again next week for more talks in Vienna.

The agreement on another meeting - set for Monday - was unexpected, and also indicated enough common ground to continue discussions.

Tehran insists its nuclear program is peaceful, but the U.S. and other world powers fear it is a cover for a planned weapons program.