The report came shortly after the Local Coordination Committees for Syria, an opposition group, reported that Syrian government forces had fired several shells toward Reyhanli, which is in Turkey's southern province of Hatay.
Several Syrians were among the casualties, according to the Syrian Observatory for Human Rights, another opposition group.
The town's location "carries sensitivity," Prime Minister Recep Tayyip Erdogan told reporters Saturday, according to the semiofficial news agency Anadolu.
"Around (20,000) to 25,000 Syrians live here in camps as our guests. Certain steps as in Reyhanli today may be taken to affect the sensitivity in Hatay by those not willing to accept the status quo."
Turkey hosts more than 190,000 Syrian refugees in state-run camps, and more Syrians who have fled their country to Turkish cities and towns. In addition, Turkey has played a major role in providing assistance and a relatively safe springboard for operations to Syrian opposition groups.
The timing of the blasts came as momentum toward a resolution of the Syrian issue has grown, said Foreign Minister Ahmet Davutoglu, according to AA. "Such blasts taking place on Saturday were no coincidence," he told reporters in Berlin, where he was on an official trip.
"It is high time for the international community to define a joint stance against a regime that uses every brutal method on its own people," Davutoglu told reporters later Sunday, after talks with his German counterpart, Guido Westerwelle.
In a statement, the opposition Syrian National Coalition condemned the attacks.
"The Coalition sees these heinous terrorist acts as an attempt to take revenge on the Turkish people and punish them for their honorable support for the Syrian people, including their welcoming of Syrian refugees who have fled the regime's crimes in their villages and cities," it said. "The Coalition views this attack as a desperate and failed attempt to sow discord between the two peoples."
The conflict in Syria has repeatedly spilled across the border to Turkey, prompting Turkish security forces to reinforce the frontier. At Turkey's request, the NATO military alliance deployed several Patriot missile batteries to protect Turkish border cities from the threat of Syrian missile attacks.