Syrian President Bashar al-Assad's government are the "usual suspects" behind car bombs in Turkey that killed around 40 people and wounded 100 more, Turkish deputy prime minister Bulent Arinc said.
He added that Turkey must wait for the results of an investigation before deciding on any response.
The blasts occurred in the town of Reyhanli close to the border and home to many of the more than 300,000 refugees who have sought shelter from the uprising against Assad that erupted in Syria in March 2011.
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An ejector seat manufacturer is to be prosecuted over the death of Red Arrows pilot Sean Cunningham at RAF Scampton in November 2011.
Police said the "active shooter" had since been shot by officers and they were not seeking any other suspects.
Rain will continue spreading in from the southwest, remaining heavy, especially in western areas.