The joint U.N.-Arab League mediator for Syria will hold meetings with U.S. Undersecretary of State Wendy Sherman and Russian Deputy Foreign Minister Gennady Gatilov in Geneva on Friday, the United Nations said Monday. The U.N. statement was issued after envoy Lakhdar Brahimi met separately with the Syrian government and opposition delegations at the beginning of a second round of peace talks in the Swiss city, expected to last at least a week. The second round was intended to follow quickly after no substantive progress was made last month at the first round of talks.