US-backed forces have captured the IS terror group's last stronghold in eastern Syria on Saturday.
"Baghouz has been liberated. The military victory against Daesh has been accomplished," Mustafa Bali, a Syrian Democratic Forces (SDF) spokesman, wrote on Twitter.
He declared the "total elimination of (the) so-called caliphate".
It marks a major milestone in the fight against the IS terror group over more than four years.
But the group is still seen as a major global threat.
Trump rejects Iran's response to US peace proposal as 'unacceptable'
US President Donald Trump has responded with a swift rejection of Iran's response to a US peace proposal on Sunday that included ending the war on all fronts, including Lebanon, providing compensation for war damages, and emphasising Iranian sovereignty over the Strait of Hormuz.
Iran sends its response to US proposal aimed at ending the war
Iran has sent its response to a US proposal for peace talks to end the war, Iranian state media reported on Sunday, as two ships were allowed to pass through the blockaded Strait of Hormuz.
Ukraine, Russia ceasefire strained as both sides report weekend attacks
A US-mediated ceasefire between Russia and Ukraine appeared under serious strain on Sunday, with both sides trading blame for weekend attacks.
Evacuation flights leave Tenerife after cruise ship virus outbreak
Groups of passengers and crew disembarked from a cruise ship hit by a deadly hantavirus outbreak on Sunday to be evacuated to their home countries where they will isolate according to national protocols to prevent further spread of the disease.
Israeli strikes kill three in Gaza, testing fragile ceasefire
Israeli strikes killed at least three Palestinians in Gaza on Sunday, including two members of the Hamas-run police force, health officials said, in violence that underscored the fragility of a US-brokered ceasefire.
