The two leaders discussed the situation in Syria and terrorism more broadly, the official said, as well as the state of affairs in Afghanistan, Ukraine and North Korea.
Saudi King Salman bin Abdulaziz Al Saud discussed on Tuesday counterterrorism with Russian President Vladimir Putin by phone, Saudi Press Agency reported.
Trump called it a "great call" Tuesday afternoon as he left the White House to spend Thanksgiving in Florida. Putin also called for co-ordination of anti-terror efforts with the US, the Kremlin said, adding that Afghanistan was also discussed.
After the meeting Putin said he will talk to United States counterpart Donald Trump on the telephone on Tuesday.
Putin and Trump most recently met informally on the sidelines of the APEC summit in Vietnam, where the two leaders had a few encounters and handshakes during "family photos".
When Assad last visited Russian Federation in October 2015, some observers remarked that Putin appeared cold to the Syrian leader.
Akar headed to Russia's Black Sea resort of Sochi to attend a trilateral meeting earlier in the same day.
In parallel with the UN-backed Geneva process, the Astana talks guaranteed by Russia, Iran and Turkey have led to the establishment of four de-escalation zones in Syria.
At first, Trump gave the impression he believed Putin more than he believed the US intelligence agencies who have accused Russian Federation of hacking Democrats' emails and spreading fake news about then-candidate Hillary Clinton. "As to whether I believe it or not, I'm with our agencies, especially as now constituted with their leadership".