Washington, Aug 1 (TIWN) The US has imposed sanctions on Iranian Foreign Minister Mohammad Javad Zarif, a latest move by Washington in its "maximum pressure" campaign against Tehran.

The sanctions freeze any assets Mr Zarif may have in America, the department said.  "Javad Zarif implements the reckless agenda of Iran's Supreme Leader (Ayatollah Ali Khamenei)," Treasury Secretary Steven Mnuchin said.  Mr Zarif tweeted the US had imposed sanctions on him because it considered him as a threat to its agenda.  Iran-US tensions: What's going on? US-Iran relations: A brief history Gulf crisis: Are we heading for a new tanker war? Tensions between the US and Iran have heightened since the US last year withdrew from the 2015 nuclear deal that aimed to curb Iranian nuclear activities.  There are growing concerns that a number of recent incidents in the Gulf could lead to a military conflict in the vital shipping region.  On Wednesday, the US extended waivers which allow Russia, China and European countries to continue civilian nuclear cooperation with Iran.