Updated

The U.N. envoy for Syria has held a "positive" meeting with U.S. Secretary of State Rex Tillerson about upcoming talks among Syria's fighting sides.

A spokeswoman for Staffan de Mistura said Tuesday that he met with the top U.S. diplomat last week as part of a "series of successful meetings with the new U.S. administration" during a trip to the United States.

The spokeswoman, Yara Sharif, told reporters in Geneva that the discussions with Tillerson were centered on the "context" of Syria's war. She said only one U.N.-led humanitarian convoy reached besieged areas in Syria last month, making it the worst month for aid deliveries since March.

Sharif said invitations to the U.N.-sponsored intra-Syrian talks set to begin Feb. 20 in Geneva will be sent Wednesday.