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
Authorities announced that 29-year-old Travis Reinking was taken into custody on Monday.
Police say a van in Toronto has struck at least 8 people, but the cause of the incident and the extent of injuries are not yet known.
Matt Campbell was a semi-finalist in MasterChef: The Professionals in 2017.