Negotiators from the U.S. and Iran were about to engage in a second day of talks Monday to solidify a permanent end to the war between the countries after a first day of mediation began with a rocky start, writes CBS NEWS.

“Mediators Qatar and Pakistan hailed what they called “encouraging progress” made during the talks as Iran and the United States agreed to create a “de-confliction cell” to address the fighting in Lebanon. A senior U.S. diplomat claimed progress on multiple fronts, including the establishment of “mechanisms” to ensure the Strait of Hormuz, a vital waterway for global energy shipments, remains open and that a ceasefire in southern Lebanon holds.

Yet the first full day of talks between the U.S. and Iran, along with Qatari and Pakistani officials, was jolted by blistering statements from President Trump who was firing off comments that offended the Iranians.

Iranian state media said talks had paused after the “publication of an insulting message by the U.S. President”. The Iranian delegation then met with Qatari mediators and left the negotiating site, state media said. The senior U.S. diplomat, who spoke on condition of anonymity to brief journalists on the ongoing talks, said late Sunday that the Iranians remained on site and the negotiations were on.

In a joint statement, Pakistan and Qatar said the high-level talks had ended and that technical negotiations would continue in Switzerland for the rest of the week. The statement said the sides had agreed to establish a “communication line” to ensure safe passage of ships in the Strait of Hormuz, as well as a mechanism to bring about an end to the fighting between Israel and the Iranian-backed militant group Hezbollah in Lebanon.

The U.S. offered no immediate comment, while Iran praised the meditators' work”.