"As a result of successful operations within the scope of Operation Peace Spring, the town of Ras al-Ain to the east of the Euphrates has been brought under control", the Turkish defence ministry wrote on Twitter. "Mine and booby trap searches are being carried out".
It said that the Turkish forces captured areas after the collapse of the SDF in some parts in northern countryside of Hasakah.
"Now the SDF's attack has started and there are very fierce clashes", he told Reuters.
However journalists in the region cite other officials who say it is impossible it was a mistake.
The area where the explosion occurred is an area known by the Turks to have US forces present there, according to the Pentagon.
Since Wednesday, Turkish troops and Syrian opposition fighters backed by Ankara have been advancing under the cover of airstrikes and artillery shelling, reaching the Manbij-Qamishli road about 30 kilometres (19 miles) south of the Turkish border.
The comments come as Turkey's offensive entered a fourth day on October 12. He called on the League to reinstate Syria's membership in the body.
But Turkish President Recep Tayyip Erdogan has dismissed mounting criticism of the operation and said on Friday evening that Turkey "will not stop it, no matter what anyone says".
It wants a 30 kilometre wide buffer zone along the border, which can also serve as an area to repatriate millions of Syrian refugees now living in Turkey. Erdogan threatened to send them to Europe if the European Union did not back his assault.
A White House statement announcing the withdrawal of USA troops prior to the Turkish offensive said that Turkey would now become responsible for all ISIS fighters in the region-a suggestion that was widely criticized.
Qatar has backed Turkey's offensive.
The rounds landed about 9 p.m. within a few hundred yards of the base on Mistenur Hill, U.S. officials said.
The military campaign of Turkey against the Kurdish forces also led to the displacement of 100,000 civilians, according to the observatory and a recent United Nations report. He said that Turkey exploits the harsh conditions of Syria in order to reinstate a reign that went obsolete and overcome an internal crisis.
In his statement on Saturday, SDF official Redur Xelil demanded the USA help protect the Kurdish fighters by closing air space to Turkish planes, describing it as a moral obligation.
"He expressed the UK's grave concern about Turkey's military operation in northern Syria, which he said could further worsen the humanitarian situation there and undermine the progress made against Islamic State", a No 10 spokesman said. Syrian Kurdish forces appeared to be holding out in some areas of the town.
Some ISIS terrorists allegedly joined Turkey's Syrian Rebel Allies, according to Robin Fleming, another researcher at the Rojava Information Center, based in Qamishlo North-East Syria. By standing aside and allowing Turkey's operation to move forward, "the Americans", said one Kurdish official, "have abandoned us to a Turkish massacre". "God willing victory will be ours".