The United States and Iran have extended their diplomatic engagement through the night, with both delegations remaining at the Burgenstock venue in Switzerland.
The US team indicated it expects to continue working with Iranian counterparts overnight in an effort to end the ongoing Middle East war.
This development follows a period of stalled negotiations, with previous efforts at a diplomatic resolution having fallen apart.
The resumption of direct talks marks a renewed attempt to de-escalate tensions that have persisted between the two nations.
The diplomatic push comes against a backdrop of heightened geopolitical risk, including concerns over the Strait of Hormuz.
Earlier reports had indicated that talks were set to resume in Pakistan, but the current session is taking place in Switzerland, suggesting a shift in the diplomatic venue and potentially the scope of discussions.