We hold Bashar al-Assad and his criminal regime accountable for the consequences of Austin’s disappearance and the pain inflicted on his mother — pain, tears, and separation," spokesman Obaida Al-Arnaot told NBC News.

Washington — The collapse of Bashar al-Assad's regime in Syria has raised hopes that more information could come to light on the whereabouts of journalist Austin Tice, who is believed to still be alive more than 12 years after his kidnapping.

The U.S. is communicating with rebel groups inside Syria amid the search for missing American journalist Austin Tice, State Department spokesperson Matthew Miller said.