"We are continuing the air operation and will come down hard on the terrorists from land at the most convenient time for us," Erdogan told his AK Party's lawmakers in a speech in parliament.
Meanwhile, the United States has conveyed serious concerns to Turkey, a NATO ally, about the impact of escalation on the goal of fighting Islamic State militants in Syria.
Turkey has previously launched military incursions in Syria against the Kurdish YPG militia, regarding it as a wing of the outlawed Kurdistan Workers Party (PKK), which Turkey, the United States and the European Union designate as a terrorist group.
NEARLY 500 TARGETS HITTurkish Defence Minister Hulusi Akar said the army had hit 471 targets in Syria and Iraq since the weekend in what he said was Turkey's biggest air operation of recent times.
It cited him as saying 254 militants had been "neutralised" in the operation, a term generally used to be mean killed.