'It's important to recognise very clearly that the provocative rhetoric coming out of Iran in the last week has been quite concerning,' Hillary Clinton told reporters during a joint media availability with Qatari Prime Minister and Foreign Minister Sheikh Hamad bin Jassim bin Jabor Al Thani.
'It has caused us and many of our partners in the region and around the world to reach out to the Iranians to impress upon them the provocative and dangerous nature of the threats to close the Strait of Hormuz. This is an international waterway,' she said.
'The United States and others are committed to keeping it open. It's part of the lifeline that keeps oil and gas moving around the world. And it's also important to speak as clearly as we can to the Iranians about the dangers of this kind of provocation,' Hillary Clinton said.
Identifying Iran as a very close and important country to Qatar, Al Thani said that they have to find a way to live together in peaceful way.
'I believe that a dialogue - political dialogue, is very important to try to sort the problem between Iran and other international communities,' he said.
'It has to be a productiv e talk with an object how to find a way to get out of this dilemma of the negotiation. But for us, it's very important that we don't trigger any tension, military tension, in the region. We are against any military tension. We think that the only best way is, as I mentioned, is to find a serious dialogue,' the Prime Minister said.
Clinton also denied US involvement in any kind of violence inside Iran, saying it had no role in the killing of one of the Iranian nuclear scientists in Tehran yesterday.
'I want to categorically deny any United States involvement in any kind of act of violence inside Iran.'
Earlier in the day, the State Department also condemned the killing of 32-year-old Iranian scientist Mostafa Ahmadi Roshan in a car bomb attack in Tehran.
'We've seen the reports of the death of the Iranian scientist as a result of an apparent bombing. We condemn any assassination or attack on an innocent person, and we express our sympathies to the family,' State Department spokesperson Victoria Nuland told reporters.
When asked that the Iranians have accused Israel and the US of carrying out this killing, Nuland said she does not has any information to share one way or the other on that.
'The United States strongly condemns this act of violence and categorically denies any involvement in the killing,' she said.