The Singapore dollar weakens slightly against its U.S. counterpart in the Asian session amid mixed signals over expected U.S.-Iran talks. On the one hand, President Trump said that the "peace talks were due to resume Tuesday in Doha," Maybank analysts say in a FX Research & Strategy report. On the other hand, however, Iran "ruled out negotiations 'at any level' with the U.S.," the analysts say. "Sentiment remains tentative," they add. The U.S. dollar is 0.1% higher at 1.2935 Singapore dollars, LSEG data show. (ronnie.harui@wsj.com)