Warning: This report contains accounts of sexual assault and violence that some readers may find distressing.

Ramia was preparing for a family picnic, on a warm summer day in her village in Latakia province in western Syria, when a white car drove up, she said.

Three armed men got out, saying they were government security forces, and dragged her into the vehicle, the teenager, whose name has been changed for her safety and to protect her identity, told the BBC World Service.

The men beat her, she said, hitting her harder when she started crying and screaming.

"One of them asked if I was Sunni or Alawite. When I said Alawite, they began insulting the sect," she added.