(CNN)Amira Abase told her father she was going to a wedding. Instead, the 15-year-old British girl hopped on a plane with two friends to Turkey -- and police fear they are headed to Syria to join ISIS. "What she's doing is completely nonsense," said Amira's father, Abase Hussen. He implored Amira to come home. "Remember how we love you. Your sister, brother, they cannot stop crying." Six days ago, the trio of British girls ran away from home and flew from London to Istanbul. It's unclear where Amira, 15-year-old Shamima Begum and 16-year-old Kadiza Sultana are. But authorities worry their next stop will be Syria.
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3 teen British girls missing for 6 days might be en route to Syria
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Cameron: Schools can help stop people from being "poisoned by this appalling death cult"
@placeholder police say they are concerned about the number of young women and girls who are either hoping to or who already have joined ISIS.