President Donald Trump warned on Monday that he would order fresh U.S. attacks on Iran's nuclear facilities should Tehran try to restart facilities that the United States bombed last month.

The U.S. wants Iran to end all uranium enrichment. The European nations have yet to make clear their position. The JCPOA limited Iran to enriching uranium up to 3.67% purity -- sufficient for civilian nuclear power purposes but below the 90% purity needed for use in a weapon.

US president has upped rhetoric as Iran maintains it will push forward with nuclear programme after US strikes.