Abu Dhabi, United Arab Emirates (CNN) — The ex-husband of an American woman killed in the United Arab Emirates said he was shocked by her fatal stabbing, but said he still feels safe there.”I’m totally horrified by what happened,” Paul Ryan said.”One just needs to look at the video, the images of that bathroom, and it knocks you out. It knocks you out,” he said. “I still hope my children have not seen that, those beautiful children, I have to make sure … I protect them as best I can.”A veiled woman attacked Ibolya Ryan, 47, on Monday in a restroom of a high-end mall in Abu Dhabi.She was killed with a sharp object during a fight in the women’s restroom, local authorities said.Police later arrested a female Emirati national of Yemeni descent, whom they described as a suspect.Paul Ryan arrived in Abu Dhabi last week to be reunited with his 11-year-old twin boys. He said he plans to move them to the United States, where they used to live. He and his 13-year-old daughter, who currently live in Vienna, Austria, will join them.