At least five people were killed and 17 others wounded on Sunday when a vehicle bomb went off in a Turkey-held area in the countryside of the northern province of Raqqa, state news agency SANA reported.
Intense clashes broke out Saturday between Syrian government troops and Turkish-led forces in northeast Syria, killing at least four Syrian soldiers, the country's state media and an opposition war monitor reported.
Turkey launched its cross-border offensive one month ago, saying it aimed to drive Kurdish-led forces from the border region and create a "safe zone" to settle Syrian refugees.
Turkish President Tayyip Erdogan accused the United States and Russian Federation on Thursday of failing to fulfill their part of a deal for Kurdish militia to leave a Syrian region bordering Turkey, and said he would raise this with President Donald Trump next week.
Russian Federation conducted its first patrol in the area earlier this month, a week after a deal was struck between Russian Federation and Turkey that moved Syrian government forces into border regions held by Kurdish groups.
Turkey views the Kurdish YPG militia as a terrorist organisation because of its links to Kurdish militants in southeastern Turkey. The Observatory and Kurdish news agency Hawar said a Syrian major general and a colonel were also wounded.
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Turks officials had confirmed it on Wednesday that the visit will proceed after a conversation of both the presidents on phone.
The Observatory said the man died in the hospital in the town of Derik from internal bleeding and broken bones.
"Innocent civilians have once again been slaughtered by murderous PKK/YPG terrorists", the ministry said on Twitter, adding the IED attack occurred in the south of Tal Abyad.
The Turkish invasion and the shift of powers on the ground has been unsettling for residents of the area - many of whom are Kurds who have either fled the Turkish invasion or are feeling abandoned by USA troops.
"To come from tens of thousands of miles away and to say, 'We will put the country's wealth, oil reserves to use, ' is against global law".
Orban said Thursday that Hungary would be able to get natural gas from the TurkStream pipeline - which will supply Russian gas to Turkey via the Black Sea - by the end of 2021.