Russia's foreign minister is embarking on a tour of the Gulf meeting key figures.
Saudi Crown Prince Mohammed bin Salman met with Jordan's King Abdullah and Bahrain's Crown Prince Salman bin Hamad in Riyadh.
Russia is set to host Afghanistan peace talks between the Afghan government and the Taliban, with representatives from the US, China and Pakistan.
Hamas is set to elect a new head of their Gaza political branch, a role currently filled by Yahya Sinwar.
The Qatari delegation's visit is reportedly a prelude to a full restoration of diplomatic ties in the 'next phase'.
Analysis: Biden has softened his tough campaign rhetoric since entering office as the US negotiates its future relationship with Saudi Arabia.
Meetings between the UN's envoy for Afghanistan and representatives of the main players in Kabul's stagnant peace process will determine the future of those talks.
After 10 years of brutal conflict the opposition forces are facing the reality of a failed movement that was unable to unseat Bashar Al-Assad.
A new interview shows a shift in Turkey's policy towards Arab nations, indicating an attempt to strengthen the line of communication.
The US envoy to Afghanistan has proposed a grand conference as peace talks continue to stagnate.