On Tuesday, Turkish gendarme units established a checkpoint blocking civilian access to the Cilvegozu border terminal.

And in the nearby town of Reyhanli, families were burying victims of the mysterious blast.

Hundreds of mourners watched as the wife and young son of 34-year-old Ahmet Tas, a Turkish citizen killed in the attack, screamed in despair.

His coffin was buried in a cemetery not far from the Syrian border.