Turkish President Recep Tayyip Erdogan said the offensive aims to remove the Kurdish-led forces from the border area and create a "safe zone" so millions of Syrian refugees can be returned.
Turkish Foreign Minister Mevlut Cavusoglu dismissed an offer by US President Donald Trump to mediate between Ankara and Kurdish YPG forces to halt Turkey's incursion in Syria, according to the transcript of an interview with German broadcaster Deutsche Welle.
Aid groups have warned of a looming humanitarian crisis, with civilians struggling to find shelter, food and water.
Khalaf was the secretary general of the Future Syria party.
The SDF are facing numerous Turkish ground and air assaults along a stretch of the Turkey-Syria border about 75 miles (120km) long.
Turkish soldiers and militia allies battled their way into a strategic Kurdish border town on Saturday as they stepped up their assault on northeastern Syria in defiance of mounting global protests and threats of United States sanctions.
Seventy-four Kurdish-led fighters, 49 Turkey-backed Syrian rebels and 30 civilians have been killed in the fighting, according to the Observatory.
Turkey has heavily bombarded the towns and made steady advances, prompting tens of thousands of civilians to flee. We are in actuality combating on two fronts: "one front in opposition to the Turkish invasion and a front in opposition to Daesh", he mentioned.
A rebel group fighting under the Syrian National Army banner said it had momentarily cut off part of the M4 highway, the main east-west artery running through the Kurds' enclave to the Syrian-Iraqi border.
In its first big attack since the assault began, Daesh claimed responsibility for a deadly vehicle bomb on Friday in Qamishli, the largest city in the Kurdish-held area.
The Kurds have made clear they feel betrayed by Mr Trump's withdrawal of U.S. forces. "The US demands that Turkey avoid actions that could result in immediate defensive action".
Thousands of people, some shouting "Erdogan terrorist", took to the streets of Paris and other European cities on Saturday in protest at the Turkish assault on Kurds in Syria.
A bill to issue sanctions against Turkish officials and banks involved in the offensive was introduced by the Democratic chairman of the House of Representatives Foreign Affairs Committee, Eliot Engel, and the committee's ranking Republican Mike McCaul. The social media account which shared the image falsely attributed it to Turkey's ongoing operation - and it also supports Saleh Muslim, a so-called former leader of PYD/PKK.
Cody Simpson Says He's 'Very, Very Happy' With Miley Cyrus
The pair were spotted earlier this week ambling about the place holding hands and eating food - prime we're-going-out behaviour. He clarified, however, that their relationship will always be a private matter, and he will not be making any comments anymore.
Mind-blowing ways on how to deal with lies
Most people tend to forget that they cohabit with other people that means you are living your life with other people in it. Same thing applies when it comes to sport bet , you need to dig deeper and find out if a sportsbook is legit or a scam.
In as much as most movies show how gambling is bad or addictive, look on the brighter side, it is a good way of making money. With so many people shaming gambling, directors are trying to put it out there that it is not as bad as people make it seem.
F1 sees distinguished manufacturers make a welcome return
It would also be nice to see a more competitive side to the sport, which usually sees one side dominate the entire season. The team is looking at Charles Leclerc from Ferrari, Marcus Ericsson or Antonio Giovinazzi who is a reserve for Ferrari.