GENEVA — The main Syrian opposition delegation arrived in Switzerland Saturday night; however, it remained unclear whether the delegation would actually participate in UN-sponsored peace talks aimed at ending Syria’s civil war.

The indirect peace talks began here Friday with a meeting between the United Nations envoy and the Syrian government delegation. The main opposition group, the Higher Negotiations Committee, or HNC, boycotted that session saying it won’t take part until a set of preliminary demands is met: releasing detainees, ending the bombardment of civilians by Russian and Syrian forces, and lifting government blockades on rebel-held areas.

The HNC later agreed to send a delegation to meet with UN officials, while still insisting it would not negotiate until its demands are met. The HNC decision to come to Geneva gave a glimmer of hope that peace efforts in Syria might actually get off the ground for the first time since two earlier rounds of negotiations collapsed in 2014.

Meanwhile, officials from Syria’s largest Kurdish group left Geneva Saturday after being excluded from the negotiations, a Kurdish official and opposition figures said.

Saleh Muslim, copresident of the Democratic Union Party, or PYD, left when it became clear he would not be invited to participate, Kurdish official Nawaf Khalil said.

The participation of the PYD has been a divisive issue in advance of the Geneva talks. Turkey, which has struggled with its own large Kurdish population, considers the PYD a terrorist organization and the HNC claims they are too close to the Syrian government.

Unlike other groups from outside the HNC that were invited as advisers, the PYD received no invitation from UN Special Envoy to Syria Staffan de Mistura.

The move to exclude the PYD angered Qadri Jamil, a former Syrian deputy prime minister who has become a leading opposition figure but is not part of the HNC. Jamil said the PYD’s military wing has been the most effective force on the ground in Syria fighting the Islamic State group.

“The PYD is a historic part of the Syrian democratic opposition and PYD today is fighting terrorism on the ground and it is a main force,’’ Jamil told a group of journalists in Geneva on Saturday.