Syria has been locked in a vicious civil war since 2011 when the Bashar al-Assad regime cracked down on pro-democracy protests with unexpected ferocity.
He also visited Putin in Moscow in October 2015, soon after Russian Federation launched its military operation in Syria.
In remarks cited by the Kremlin, Putin congratulated the Syrian leader on what he said were significant successes on the battlefield achieved by the Syrian military.
Russian President Vladimir Putin (R) speaks with his Syrian counterpart Bashar al-Assad during their meeting in Sochi on May 17, 2018.
"The next task, of course, the economic recovery and humanitarian aid for those people in a hard situation", Mr Putin added.
Taliban Attack Tests Afghan Forces Near Iran Border
The Ministry of Defense (MoD) claims that the Taliban militants have suffered heavy casualties during the attack on Farah city. The US military said in a statement that it had A-10 warplanes over the city, "which remains under government control".
The visit of Assad to Sochi is his second, as last November the president met with Putin in Sochi and hailed the Russian support to Syria. The UN has hosted several rounds of peace talks in Geneva that have made no progress towards ending the conflict.
Assad assured that the country returns to stability and it promotes the political process begun earlier. They will be sent to the United Nations, it is on the basis of the Geneva process. "But with you and other partners and friends, we will continue to make strong progress in the peace process", Mr Assad was quoted as saying in the statement.
Russian Foreign Minister Sergei Lavrov said Western attacks in the country removed any moral obstacle to arming Syria.
De Mistura, speaking Wednesday to the UN Security Council's monthly meeting on the Syria conflict, described what he called the classic Syrian regime tactic of a bombardment of a rebel territory followed by negotiations and then mass evacuations from the defeated area.
Sources said the two leaders will meet for around four to six hours for the "agendaless" talks where deliberations on bilateral issues are likely to be very limited.