Turkish deputy prime minister Bulent Arinc has said all nine people detained after yesterday's car bombings in the border town of Reyhanli are Turkish citizens, Reuters has reported.
The Turkish administration earlier said it suspected Syrian involvement in the deadly explosions.
More top news
It will be increasingly humid and thundery with highs of 30C or more today.
Holidaymakers in Tunisia are determined not to be beaten. But, as Neil Connery writes, it won't be easy to escape the shock of the massacre.
Drink lots of water, stay out of the sun during the middle of the day, and take particular care of vulnerable people.