Heavy machine gun fire and the sound of mortar bombs has been heard along the Turkey-Syrian border near the Syrian town of Haram, according to a Reuters witness.
It was not clear whether the firing was from the Syrian army or from rebels fighting to overthrow President Bashar al-Assad.
The firing could be heard from the Turkish border village of Besaslan in southern Hatay province.
More top news
Today's crash is the most serious incident involving The Smiler roller coaster, which has been beset with problems since opening in 2013.
The model and her footballer husband announced the birth of their second child who they have named Liberty Rose.
After a wet and windy start to the week, conditions will gradually improve, with temperatures creeping up, and up.