The sixth round of U.S.-Iran nuclear talks will be held on Sunday in Muscat, the Omani foreign minister said on Thursday, after U.S. President Donald Trump reiterated that Tehran would not be allowed to have a nuclear weapon.

The move comes after the Iranian defense minister warned that Tehran would target U.S. bases in the area if tensions escalated.

U.S. embassies and military bases across the Middle East are on high alert, as fears grow about and Israeli strike on Iran.

The US State and Defense departments on Wednesday made efforts to arrange the departure of non-essential personnel from locations around the Middle East, according to US officials and sources familiar with the efforts.

The risk of conflict is growing as Iran signals strikes on Israeli nuclear facilities despite ongoing nuclear talks.

U.S. President Donald Trump said he was less confident that Iran will agree to stop uranium enrichment in a nuclear deal with Washington, according to an interview released on Wednesday. "I don’t know,

Israel’s threats to strike Iran’s nuclear facilities may actually be helping — not hurting — President DONALD TRUMP ’s efforts to secure a nuclear deal with Tehran, per analysts. Trump said Monday night he spoke with Israeli Prime Minister BENJAMIN NETANYAHU and reiterated his commitment to talks with Iran.