State Department spokesperson says the move is "completely inconsistent with efforts to lower tensions and to ensure calm".
According to Amnesty International, Iran was the top executioner in the Middle East last year.
No group immediately claims responsibility for the attack.
Says the US and its partners want a diplomatic solution to bring America, Iran back into compliance with the 2015 nuclear deal.
Alleges that Prince Mohammed bin Salman boasted in 2014 that he could kill King Abdullah.
Other nations taking part this year include France, the United States, India and Germany, as well as Britain.
Dubs climate change "one of the biggest crises", says problem was visible 20 years ago but world didn't realise its implications.
“Some governments have made big errors and sinned in normalising (their relations) with the oppressive Zionist regime": Khamenei
Settlement construction is considered illegal under international law.
The coalition has for the past two weeks reported almost daily strikes around Marib.
Israeli and international rights groups condemn the move as assault on civil society.
The pavilion received 55,000 visitors in just the opening week of the mega event.
The PM will undertake the visit at the invitation of Crown Prince Salman and will be accompanied by a high-level delegation.
EU’s diplomatic chief has said he is “ready” to meet Iranian leaders in Brussels as part of efforts to revive the faltering deal.
Little has been done to address the challenge in a region long plagued by civil strife, war and refugee flows.
Visitors must be fully vaccinated against coronavirus and must continue to wear masks on mosque grounds.
Critics say projects around Jerusalem will largely bisect occupied West Bank.
Seven people died and dozens were wounded as a result of violence that erupted on Thursday.
Tensions around last year’s massive explosion turn parts of Lebanon’s capital into a warzone.
He had campaigned as a nationalist and criticised the influence of Iran.