The Turkish army says it has killed 25 Kurdish "terrorists" in airstrikes on Syria on the fifth day of an unprecedented operation inside the country.
The Turkish military on Wednesday launched an operation codenamed "Euphrates Shield" inside Syria to oust Daesh from the border region and also counter advances by a Kurdish militia detested by Ankara.
According to the reports, the Turkish soldier was killed after a rocket hit the tank in which he was traveling.
The monitor also said at least four Kurdish fighters had been killed and 15 injured in Turkish bombardment of the two areas.
The monitoring group said rebels backed by Turkish tanks fought till dawn against rival militias allied to the SDF around al-Amarna, a village near Jarablus, but failed to take it.
The Jarablus Military Council, supported by the USA -backed and Kurdish-led Syria Democratic Forces, said the airstrikes on their bases in the village of Amarneh marked an "unprecedented and unsafe escalation".
But Turkish officials have openly stated that their goal in Syria is as much about ensuring Kurdish forces do not extend territory they already control along Turkey's border, as it is about driving Islamic State from its strongholds.
There was no immediate comment from the YPG militia, but forces aligned with the Kurdish group had said on Saturday that no Kurdish militia had been in areas being targeted by Turkish troops or its allies.
Karkamis, Turkey - Turkey on Saturday sent six more tanks into Syria as pro-Ankara forces pressed on with de-mining work in a town captured from Daesh militants this week, an AFP correspondent said.
President Recep Tayyip Erdogan was due to visit the city on Sunday to express condolences for last weekend's suicide bombing there at a Kurdish wedding that left 54 dead.
The Saturday statement, citing military sources, comes hours after Kurdish-led forces in northern Syria said Turkish airstrikes had hit their bases near Jarablus, a town seized by Turkey-backed rebels earlier this week.
Ankara wants to force the Kurds to withdraw to the east of Euphrates River, stopping short of establishing a corridor to link two Kurdish-held areas in northwestern Syria, the BBC said.
Syria has been mired in civil war since 2011, with government forces loyal to President Bashar Assad fighting a number of opposition factions and extremist groups.
The UN says it has "pre-positioned" aid to go to the city for some 80,000 people.
Russia, which backs Assad, has endorsed the proposal.