At least seven people were killed and dozens wounded when a car bomb exploded close to a police station in the south-eastern Turkish town of Gaziantep on Monday, a security source said.
Television footage showed firefighters attempting to douse a fierce blaze that gutted several vehicles.
Turkey has opened a centre in Gaziantep to receive international aid for Syrian refugees fleeing the uprising against President Bashar al-Assad. Turkey is struggling to cope with an influx of almost 70,000 Syrian refugees.
There was no immediate claim of responsibility but southeastern Turkey has seen frequent attacks by the Kurdistan Workers' Party (PKK), designated a terrorist group by Turkey, the United States and European Union. The group launched a separatist insurgency in the region 28 years ago.
'Deadly bombing' hits Turkish city of Gaziantep
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