JD Vance (AP)SWITZERLAND: US Vice President JD Vance met senior Iranian officials on Sunday as the White House sought to build on last week's interim agreement aimed at ending the conflict involving Iran and advancing diplomatic engagement.Vance held discussions with key Iranian negotiators, including parliamentary speaker Mohammad Bagher Qalibaf and Foreign Minister Abbas Araghchi, at a resort near Lake Lucerne in Switzerland, AP reported.Despite the diplomatic engagement, the ongoing conflict in Lebanon between Israel and the Iranian-backed Hezbollah group continues to threaten progress in the talks.US focused on nuclear negotiationsAccording to reports, the United States is seeking to secure Iran's commitment to continued negotiations over its nuclear programme as part of broader efforts to ease regional tensions and strengthen the interim agreement.Addressing a live press conference at the ongoing Swiss diplomatic talks, Vance stated that "Trump is committed to seeing a full regional ceasefire.” "We've seen great progress over the last couple of days in ensuring the ceasefire in Lebanon holds," Vance added.Earlier, Iranian Foreign Ministry spokesperson Esmail Baghaei also said that Tehran's primary focus during the negotiations would be the ongoing war between Israel and Lebanon. His remarks underscored Iran's intention to place regional security concerns at the centre of discussions alongside any talks related to its nuclear programme.These negotiations are operating under Memorandum of Understanding (MoU) finalised on June 17 by President Donald Trump and Iranian President Masoud Pezeshkian.