Lebanese general security members stand near buses that will take Syrian refugees, who fled to Lebanon, back to Syria from the southern village of Shebaa, Lebanon April 18, 2018.

Image used for illustrative purpose. Syrian children who fled to Lebanon wait for buses to go back to Syria from the southern village of Shebaa, Lebanon April 18,2018.

Syrian families who fled to Lebanon wait for buses to go back to Syria from the southern village of Shebaa, Lebanon April 18,2018. Reuters/Aziz Taher

Buses carry Syrian refugees, who fled to Lebanon, back to Syria from the southern village of Shebaa, Lebanon April 18, 2018. REUTERS/Aziz Taher

A Syrian refugee girl, who fled to Lebanon, looks through a bus window as she goes back to Syria from the southern village of Shebaa, Lebanon April 18, 2018.

A Syrian refugee child looks through a shattered glass window of a bus as she arrives at the Syrian-Lebanese border of Jdaydet Yabous, Syria, April 18, 2018.

A picture of Syrian President Bashar al Assad is seen on a bus as Syrian refugees who fled to Lebanon go back to Syria from the southern village of Shebaa, Lebanon April 18, 2018.

Buses carrying Syrian refugees who fled to Lebanon arrive at Syrian-Lebanese border of Jdaydet Yabous, Syria, April 18, 2018.

Lebanese general security member holds Syrian refugee children, who fled to Lebanon, as they wait for buses to go back to Syria from the southern village of Shebaa, Lebanon April 18, 2018.

Buses carrying Syrian refugees who fled to Lebanon arrive at Syrian-Lebanese border of Jdaydet Yabous, Syria, April 18, 2018.

Syrian refugees who fled to Lebanon hold Syrian flags as they arrive at Syrian-Lebanese border of Jdaydet Yabous, Syria, April 18, 2018.