A car bomb exploded at the main entrance to Syria’s Bab al-Hawa border crossing into Turkey on Tuesday.

A car bomb exploded at the main entrance to Syria's Bab al-Hawa border crossing into Turkey on Tuesday.

"A car bomb hit the main gateway to the Bab al-Hawa border crossing with Turkey," said the UK-based Syrian Opposition Observatory, which could not immediately verify whether there were any casualties.

Tuesday's was the second car bomb attack on the crossing.

On February 11, one exploded in the area that lies between the Turkish and Syrian control posts and killed 13 people, among them three Turks.

In a different context, the Syrian army firmly controlled Sheba' village in Damascus countryside after fierce clashes with the terrorist groups.