Turkish authorities are investigating an explosion at a house sheltering Syrians in a town near the border that killed two suspected bomb-makers, the local governor's office said late on Wednesday.
Wednesday's blast took place in the southern town of Reyhanli, local media reported. Two Syrians died in hospital of their injuries.
The pair are believed to have been preparing explosives, the governor's office said, adding that police had confiscated a gun and a silencer at the scene.
In 2013, twin car bombs in Reyhanli killed 46 people in attacks blamed on Syrian pro-regime forces suspected of targeting opposition supporters who fled the war across the border. The Syrian government denied any involvement.
Turkey, a vocal opponent of President Bashar al-Assad's regime, hosts 2.7 million Syrian refugees who have fled the war.
President Recep Tayyip Erdogan recently suggested that Syrian refugees in Turkey could be offered Turkish citizenship.
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