"So far, it's been very minor," Trump told Time magazine in an interview released Monday.

However, Trump said he accepts the US intelligence assessment that Iran is behind the explosions that damaged the hulls of Norwegian and Japanese tankers.

"I don't think too many people don't believe it," he said.

Iran denies responsibility for the incidents, which come as tensions spiral between Washington and Tehran over what the United States says is Iran's secret push to develop nuclear weapons technology. Iran also denies having such a policy.

Trump told Time he would order a US military response if Iran had to be stopped getting nuclear arms, but he was not eager for war otherwise.

"I would certainly go over nuclear weapons," he said, "and I would keep the other a question mark."

"Other places get such vast amounts of oil there," Trump said. "We get very little. We have made tremendous progress in the last two and a half years in energy. And when the pipelines get built, we're now an exporter of energy. So we're not in the position that we used to be in in the Middle East."