US Middle East envoy Steve Witkoff and senior adviser Jared Kushner arrived in Doha to meet Qatari mediators, the Gulf state's foreign ministry said on Tuesday, as Washington's negotiating team returned to the region for the latest round of talks to end the Iran war.

"Mr Steve Witfoff and Mr Jared Kushner are here in Doha to meet with mediators, with Qatari officials," foreign ministry spokesman Majed Al Ansari said.

The talks will be around all regional issues... including, of course, negotiations with Iran, but also including Lebanon," he added. "They are not here for their negotiations with the Iranians."

Iran on Monday separately announced it will send delegations to Qatar this week, although Tehran insisted it has not agreed to meet with the US “at any level” after attacks across the Persian Gulf over the weekend challenged the ongoing talks.

According to Tehran, the Iranian technical negotiators will focus strictly on consultations with Qatari officials on points of the framework deal, with the release of Iran’s frozen assets and the lifting of sanctions on Iranian oil exports at the forefront of the talks.