"America is a terrorist country and backs terrorism... therefore, we can not normalize ties with such a country", Khamenei said.
Last week, the Revolutionary Guards linked the "brutal attack" to Donald Trump's visit last month to Riyadh, where the United States president pointed the finger at Iran for fuelling "the fires of sectarian conflict and terror".
The source noted that Humayqani's inclusion on the Saudi terror list is proof that Saudi Arabia, which created the coalition to support Yemen's legal government and combat terror, "won't make it easy for those proved to be involved in supporting and financing terror". During the Barack Obama era, Iran enjoyed the opportunity to fill the vacuum in the Middle East after the White House abandoned its traditional allies, like Turkey and Saudi Arabia.
With relations between two nations on the rocks, the 2015 nuclear deal, which was considered a breakthrough at the time it was struck, also came in play.More news: United Kingdom prime minister 'a dead woman walking'
The Iranian foreign minister has traveled to Norway to participate in the Oslo Forum, which gathers leading armed conflict mediation practitioners.
Urging the United States administration to revise its approach to the deal, repeatedly decried by Trump as the "worst deal ever negotiated", the top Iranian diplomat argued that in the long run the USA "will find it necessary to abide by the deal", as cited by Iran Front Page News.
"Some of the problems with the U.S. are essentially unresolvable as the US's problem with us has nothing to do with nuclear energy or human rights, their problem is with the principle of the Islamic Republic", added the Leader.
Press TV reported that a bomber's explosive vest had also been discovered and deactivated in the vicinity of the mausoleum adding that an ambulance belonging to the Welfare Organization of Iran was targeted when terrorists fired 16 bullets at the vehicle at the mausoleum.
The comments sparked an immediate backlash from Iran.