US and Iranian delegations arrive in Switzerland as negotiations with the United States begin, according to multiple reports. The Iranian delegation is described as having reached Switzerland for the talks, with coverage noting the start of the meeting process once both sides have arrived. Other reporting similarly states that delegations from both countries arrive in Switzerland for discussions, framing the development as the opening stage of formal talks. The articles present the arrival of the delegations as the key early milestone, indicating that face-to-face or scheduled negotiation sessions are underway or about to begin in Switzerland. While the provided excerpts do not detail the agenda, the expected subjects, or participants beyond the delegations themselves, they consistently describe the same sequence: both sides travel to Switzerland and meetings start there. The reports therefore converge on the timing and location of the talks and emphasize the fact that official delegation-level discussions are taking place in Switzerland.