President Donald Trump said US personnel were being moved from the potentially "dangerous" Middle East on Wednesday as nuclear talks with Iran faltered and fears grew of a regional conflict.

Trump also reiterated that he would not allow Iran to have a nuclear weapon, amid mounting speculation that Israel could strike Tehran's facilities.

Iran threatened Wednesday to target US military bases in the region if conflict breaks out.

A US official had earlier said that staff levels at the embassy in Iraq were being reduced over security concerns, while there were reports that personnel were also being moved from Kuwait and Bahrain.

"Well they are being moved out because it could be a dangerous place," Trump told reporters in Washington when asked about the reports of personnel being moved.

"We've given notice to move out and we'll see what happens."

Trump then added: "They can't have a nuclear weapon, very simple. We're not going to allow that."

Tehran and Washington have held five rounds........

© Al Monitor