One Turkish soldier has been killed and five others sustained light injuries in clashes with Islamic State (IS) extremist group in northern Syria, the Turkish army has said in a statement.
The November 25 statement came a day after Turkey said three of its soldiers were killed in what the military said were suspected Syrian air strikes in northern Syria.
The army said 10 other soldiers were injured in the predawn air strikes on November 24. Syrian activists, however, disputed that claim, saying the soldiers were killed by IS militants.
Turkey sent ground troops into northern Syria in August, to support Syrian opposition forces in the fight against IS militants and to curb Syrian Kurdish territorial gains.
Turkish troops are pushing to capture the town of Al-Bab, the last major IS stronghold in northern Syria. The city is located some 30 kilometers south of the Syria-Turkey border.
Home to at least 2.7 million Syrian refugees, Turkey seeks to establish a "safe-zone" inside Syria.
The Syrian government opposes the Turkish incursion.